Find the Product (x+7)(5x^2-7x-4)-(x-3)(4x^3-x^2+4x-3)

$(x + 7) (5 x^{2} - 7 x - 4) - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Step 1

Simplify each term.

Expand $(x + 7) (5 x^{2} - 7 x - 4)$ by multiplying each term in the first expression by each term in the second expression.

$x (5 x^{2}) + x (- 7 x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Simplify each term.

Rewrite using the commutative property of multiplication.

$5 x \cdot x^{2} + x (- 7 x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $x$ by $x^{2}$ by adding the exponents.

Move $x^{2}$ .

$5 (x^{2} x) + x (- 7 x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $x^{2}$ by $x$ .

Raise $x$ to the power of $1$ .

$5 (x^{2} x^{1}) + x (- 7 x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

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

$5 x^{2 + 1} + x (- 7 x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Add $2$ and $1$ .

$5 x^{3} + x (- 7 x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Rewrite using the commutative property of multiplication.

$5 x^{3} - 7 x \cdot x + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $x$ by $x$ by adding the exponents.

Move $x$ .

$5 x^{3} - 7 (x \cdot x) + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $x$ by $x$ .

$5 x^{3} - 7 x^{2} + x \cdot - 4 + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Move $- 4$ to the left of $x$ .

$5 x^{3} - 7 x^{2} - 4 \cdot x + 7 (5 x^{2}) + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $5$ by $7$ .

$5 x^{3} - 7 x^{2} - 4 x + 35 x^{2} + 7 (- 7 x) + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $- 7$ by $7$ .

$5 x^{3} - 7 x^{2} - 4 x + 35 x^{2} - 49 x + 7 \cdot - 4 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $7$ by $- 4$ .

$5 x^{3} - 7 x^{2} - 4 x + 35 x^{2} - 49 x - 28 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Add $- 7 x^{2}$ and $35 x^{2}$ .

$5 x^{3} + 28 x^{2} - 4 x - 49 x - 28 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Subtract $49 x$ from $- 4 x$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - (x - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Apply the distributive property.

$5 x^{3} + 28 x^{2} - 53 x - 28 + (- x - - 3) (4 x^{3} - x^{2} + 4 x - 3)$

Multiply $- 1$ by $- 3$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 + (- x + 3) (4 x^{3} - x^{2} + 4 x - 3)$

Expand $(- x + 3) (4 x^{3} - x^{2} + 4 x - 3)$ by multiplying each term in the first expression by each term in the second expression.

$5 x^{3} + 28 x^{2} - 53 x - 28 - x (4 x^{3}) - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Simplify each term.

Rewrite using the commutative property of multiplication.

$5 x^{3} + 28 x^{2} - 53 x - 28 - 1 \cdot 4 x \cdot x^{3} - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x$ by $x^{3}$ by adding the exponents.

Move $x^{3}$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 1 \cdot 4 (x^{3} x) - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x^{3}$ by $x$ .

Raise $x$ to the power of $1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 1 \cdot 4 (x^{3} x^{1}) - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

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

$5 x^{3} + 28 x^{2} - 53 x - 28 - 1 \cdot 4 x^{3 + 1} - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Add $3$ and $1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 1 \cdot 4 x^{4} - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $- 1$ by $4$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - x (- x^{2}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Rewrite using the commutative property of multiplication.

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - 1 \cdot - 1 x \cdot x^{2} - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x$ by $x^{2}$ by adding the exponents.

Move $x^{2}$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - 1 \cdot - 1 (x^{2} x) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x^{2}$ by $x$ .

Raise $x$ to the power of $1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - 1 \cdot - 1 (x^{2} x^{1}) - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

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

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - 1 \cdot - 1 x^{2 + 1} - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Add $2$ and $1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - 1 \cdot - 1 x^{3} - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $- 1$ by $- 1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + 1 x^{3} - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x^{3}$ by $1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - x (4 x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Rewrite using the commutative property of multiplication.

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 1 \cdot 4 x \cdot x - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x$ by $x$ by adding the exponents.

Move $x$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 1 \cdot 4 (x \cdot x) - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $x$ by $x$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 1 \cdot 4 x^{2} - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $- 1$ by $4$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 4 x^{2} - x \cdot - 3 + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $- 3$ by $- 1$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 4 x^{2} + 3 x + 3 (4 x^{3}) + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $4$ by $3$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 4 x^{2} + 3 x + 12 x^{3} + 3 (- x^{2}) + 3 (4 x) + 3 \cdot - 3$

Multiply $- 1$ by $3$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 4 x^{2} + 3 x + 12 x^{3} - 3 x^{2} + 3 (4 x) + 3 \cdot - 3$

Multiply $4$ by $3$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 4 x^{2} + 3 x + 12 x^{3} - 3 x^{2} + 12 x + 3 \cdot - 3$

Multiply $3$ by $- 3$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + x^{3} - 4 x^{2} + 3 x + 12 x^{3} - 3 x^{2} + 12 x - 9$

Add $x^{3}$ and $12 x^{3}$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + 13 x^{3} - 4 x^{2} + 3 x - 3 x^{2} + 12 x - 9$

Subtract $3 x^{2}$ from $- 4 x^{2}$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + 13 x^{3} - 7 x^{2} + 3 x + 12 x - 9$

Add $3 x$ and $12 x$ .

$5 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} + 13 x^{3} - 7 x^{2} + 15 x - 9$

Step 2

Simplify by adding terms.

Add $5 x^{3}$ and $13 x^{3}$ .

$18 x^{3} + 28 x^{2} - 53 x - 28 - 4 x^{4} - 7 x^{2} + 15 x - 9$

Subtract $7 x^{2}$ from $28 x^{2}$ .

$18 x^{3} + 21 x^{2} - 53 x - 28 - 4 x^{4} + 15 x - 9$

Add $- 53 x$ and $15 x$ .

$18 x^{3} + 21 x^{2} - 38 x - 28 - 4 x^{4} - 9$

Subtract $9$ from $- 28$ .

$18 x^{3} + 21 x^{2} - 38 x - 4 x^{4} - 37$

Find the Product (x+7)(5x^2-7x-4)-(x-3)(4x^3-x^2+4x-3)

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