Expand Using the Binomial Theorem (2x^2+y^2)^4

${(2 x^{2} + y^{2})}^{4}$

Step 1

Use the binomial expansion theorem to find each term. The binomial theorem states ${(a + b)}^{n} = \sum_{k = 0}^{n} n C k \cdot (a^{n - k} b^{k})$ .

$\sum_{k = 0}^{4} \frac{4!}{(4 - k)! k!} \cdot {(2 x^{2})}^{4 - k} \cdot {(y^{2})}^{k}$

Step 2

Expand the summation.

$\frac{4!}{(4 - 0)! 0!} \cdot {(2 x^{2})}^{4 - 0} \cdot {(y^{2})}^{0} + \frac{4!}{(4 - 1)! 1!} \cdot {(2 x^{2})}^{4 - 1} \cdot {(y^{2})}^{1} + \frac{4!}{(4 - 2)! 2!} \cdot {(2 x^{2})}^{4 - 2} \cdot {(y^{2})}^{2} + \frac{4!}{(4 - 3)! 3!} \cdot {(2 x^{2})}^{4 - 3} \cdot {(y^{2})}^{3} + \frac{4!}{(4 - 4)! 4!} \cdot {(2 x^{2})}^{4 - 4} \cdot {(y^{2})}^{4}$

Step 3

Simplify the exponents for each term of the expansion.

$1 \cdot {(2 x^{2})}^{4} \cdot {(y^{2})}^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Step 4

Simplify each term.

Multiply ${(2 x^{2})}^{4}$ by $1$ .

${(2 x^{2})}^{4} \cdot {(y^{2})}^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Apply the product rule to $2 x^{2}$ .

$2^{4} {(x^{2})}^{4} \cdot {(y^{2})}^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Raise $2$ to the power of $4$ .

$16 {(x^{2})}^{4} \cdot {(y^{2})}^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(x^{2})}^{4}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{2 \cdot 4} \cdot {(y^{2})}^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $4$ .

$16 x^{8} \cdot {(y^{2})}^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(y^{2})}^{0}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} \cdot y^{2 \cdot 0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $0$ .

$16 x^{8} \cdot y^{0} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Anything raised to $0$ is $1$ .

$16 x^{8} \cdot 1 + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $16$ by $1$ .

$16 x^{8} + 4 \cdot {(2 x^{2})}^{3} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Apply the product rule to $2 x^{2}$ .

$16 x^{8} + 4 \cdot (2^{3} {(x^{2})}^{3}) \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Raise $2$ to the power of $3$ .

$16 x^{8} + 4 \cdot (8 {(x^{2})}^{3}) \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(x^{2})}^{3}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 4 \cdot (8 x^{2 \cdot 3}) \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $3$ .

$16 x^{8} + 4 \cdot (8 x^{6}) \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $8$ by $4$ .

$16 x^{8} + 32 x^{6} \cdot {(y^{2})}^{1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(y^{2})}^{1}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 32 x^{6} \cdot y^{2 \cdot 1} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $1$ .

$16 x^{8} + 32 x^{6} \cdot y^{2} + 6 \cdot {(2 x^{2})}^{2} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Apply the product rule to $2 x^{2}$ .

$16 x^{8} + 32 x^{6} y^{2} + 6 \cdot (2^{2} {(x^{2})}^{2}) \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Raise $2$ to the power of $2$ .

$16 x^{8} + 32 x^{6} y^{2} + 6 \cdot (4 {(x^{2})}^{2}) \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(x^{2})}^{2}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 32 x^{6} y^{2} + 6 \cdot (4 x^{2 \cdot 2}) \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $2$ .

$16 x^{8} + 32 x^{6} y^{2} + 6 \cdot (4 x^{4}) \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $4$ by $6$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} \cdot {(y^{2})}^{2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(y^{2})}^{2}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} \cdot y^{2 \cdot 2} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $2$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} \cdot y^{4} + 4 \cdot {(2 x^{2})}^{1} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Simplify.

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 4 \cdot (2 x^{2}) \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $4$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} \cdot {(y^{2})}^{3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(y^{2})}^{3}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} \cdot y^{2 \cdot 3} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $3$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} \cdot y^{6} + 1 \cdot {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply ${(2 x^{2})}^{0}$ by $1$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + {(2 x^{2})}^{0} \cdot {(y^{2})}^{4}$

Apply the product rule to $2 x^{2}$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + 2^{0} {(x^{2})}^{0} \cdot {(y^{2})}^{4}$

Anything raised to $0$ is $1$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + 1 {(x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply ${(x^{2})}^{0}$ by $1$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + {(x^{2})}^{0} \cdot {(y^{2})}^{4}$

Multiply the exponents in ${(x^{2})}^{0}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + x^{2 \cdot 0} \cdot {(y^{2})}^{4}$

Multiply $2$ by $0$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + x^{0} \cdot {(y^{2})}^{4}$

Anything raised to $0$ is $1$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + 1 \cdot {(y^{2})}^{4}$

Multiply ${(y^{2})}^{4}$ by $1$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + {(y^{2})}^{4}$

Multiply the exponents in ${(y^{2})}^{4}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + y^{2 \cdot 4}$

Multiply $2$ by $4$ .

$16 x^{8} + 32 x^{6} y^{2} + 24 x^{4} y^{4} + 8 x^{2} y^{6} + y^{8}$

Expand Using the Binomial Theorem (2x^2+y^2)^4

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