Expand the Trigonometric Expression (2a^x+1/2b^x)^2

${(2 a^{x} + \frac{1}{2} b^{x})}^{2}$

Step 1

Combine fractions.

Combine $\frac{1}{2}$ and $b^{x}$ .

${(2 a^{x} + \frac{b^{x}}{2})}^{2}$

Rewrite ${(2 a^{x} + \frac{b^{x}}{2})}^{2}$ as $(2 a^{x} + \frac{b^{x}}{2}) (2 a^{x} + \frac{b^{x}}{2})$ .

$(2 a^{x} + \frac{b^{x}}{2}) (2 a^{x} + \frac{b^{x}}{2})$

Step 2

Expand $(2 a^{x} + \frac{b^{x}}{2}) (2 a^{x} + \frac{b^{x}}{2})$ using the FOIL Method.

Apply the distributive property.

$2 a^{x} (2 a^{x} + \frac{b^{x}}{2}) + \frac{b^{x}}{2} (2 a^{x} + \frac{b^{x}}{2})$

Apply the distributive property.

$2 a^{x} (2 a^{x}) + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x} + \frac{b^{x}}{2})$

Apply the distributive property.

$2 a^{x} (2 a^{x}) + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Step 3

Simplify and combine like terms.

Simplify each term.

Rewrite using the commutative property of multiplication.

$2 \cdot 2 a^{x} a^{x} + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Multiply $a^{x}$ by $a^{x}$ by adding the exponents.

Move $a^{x}$ .

$2 \cdot 2 (a^{x} a^{x}) + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$2 \cdot 2 a^{x + x} + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Add $x$ and $x$ .

$2 \cdot 2 a^{2 x} + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Multiply $2$ by $2$ .

$4 a^{2 x} + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Cancel the common factor of $2$ .

Factor $2$ out of $2 a^{x}$ .

$4 a^{2 x} + 2 (a^{x}) \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Cancel the common factor.

$4 a^{2 x} + 2 a^{x} \frac{b^{x}}{2} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Rewrite the expression.

$4 a^{2 x} + a^{x} b^{x} + \frac{b^{x}}{2} (2 a^{x}) + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Rewrite using the commutative property of multiplication.

$4 a^{2 x} + a^{x} b^{x} + 2 \frac{b^{x}}{2} a^{x} + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Cancel the common factor of $2$ .

Cancel the common factor.

$4 a^{2 x} + a^{x} b^{x} + 2 \frac{b^{x}}{2} a^{x} + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Rewrite the expression.

$4 a^{2 x} + a^{x} b^{x} + b^{x} a^{x} + \frac{b^{x}}{2} \cdot \frac{b^{x}}{2}$

Combine.

$4 a^{2 x} + a^{x} b^{x} + b^{x} a^{x} + \frac{b^{x} b^{x}}{2 \cdot 2}$

Multiply $b^{x}$ by $b^{x}$ by adding the exponents.

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$4 a^{2 x} + a^{x} b^{x} + b^{x} a^{x} + \frac{b^{x + x}}{2 \cdot 2}$

Add $x$ and $x$ .

$4 a^{2 x} + a^{x} b^{x} + b^{x} a^{x} + \frac{b^{2 x}}{2 \cdot 2}$

Multiply $2$ by $2$ .

$4 a^{2 x} + a^{x} b^{x} + b^{x} a^{x} + \frac{b^{2 x}}{4}$

Add $a^{x} b^{x}$ and $b^{x} a^{x}$ .

Reorder $b^{x}$ and $a^{x}$ .

$4 a^{2 x} + a^{x} b^{x} + a^{x} b^{x} + \frac{b^{2 x}}{4}$

Add $a^{x} b^{x}$ and $a^{x} b^{x}$ .

$4 a^{2 x} + 2 a^{x} b^{x} + \frac{b^{2 x}}{4}$

Expand the Trigonometric Expression (2a^x+1/2b^x)^2

Related Questions

Support LCMGCF.com by disabling your adblocker.