Simplify (1+4x+3x^2)(2-7x-9x^2)

$(1 + 4 x + 3 x^{2}) (2 - 7 x - 9 x^{2})$

Expand $(1 + 4 x + 3 x^{2}) (2 - 7 x - 9 x^{2})$ by multiplying each term in the first expression by each term in the second expression.

$1 \cdot 2 + 1 (- 7 x) + 1 (- 9 x^{2}) + 4 x \cdot 2 + 4 x (- 7 x) + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Simplify terms.

Simplify each term.

Multiply $2$ by $1$ .

$2 + 1 (- 7 x) + 1 (- 9 x^{2}) + 4 x \cdot 2 + 4 x (- 7 x) + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $- 7 x$ by $1$ .

$2 - 7 x + 1 (- 9 x^{2}) + 4 x \cdot 2 + 4 x (- 7 x) + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $- 9 x^{2}$ by $1$ .

$2 - 7 x - 9 x^{2} + 4 x \cdot 2 + 4 x (- 7 x) + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $2$ by $4$ .

$2 - 7 x - 9 x^{2} + 8 x + 4 x (- 7 x) + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Rewrite using the commutative property of multiplication.

$2 - 7 x - 9 x^{2} + 8 x + 4 \cdot - 7 x \cdot x + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

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

Move $x$ .

$2 - 7 x - 9 x^{2} + 8 x + 4 \cdot - 7 (x \cdot x) + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $x$ by $x$ .

$2 - 7 x - 9 x^{2} + 8 x + 4 \cdot - 7 x^{2} + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $4$ by $- 7$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} + 4 x (- 9 x^{2}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Rewrite using the commutative property of multiplication.

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} + 4 \cdot - 9 x \cdot x^{2} + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

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

Move $x^{2}$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} + 4 \cdot - 9 (x^{2} x) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

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

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

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} + 4 \cdot - 9 (x^{2} x^{1}) + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

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

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} + 4 \cdot - 9 x^{2 + 1} + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Add $2$ and $1$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} + 4 \cdot - 9 x^{3} + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $4$ by $- 9$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 3 x^{2} \cdot 2 + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Multiply $2$ by $3$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} + 3 x^{2} (- 7 x) + 3 x^{2} (- 9 x^{2})$

Rewrite using the commutative property of multiplication.

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} + 3 \cdot - 7 x^{2} x + 3 x^{2} (- 9 x^{2})$

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

Move $x$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} + 3 \cdot - 7 (x \cdot x^{2}) + 3 x^{2} (- 9 x^{2})$

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

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

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} + 3 \cdot - 7 (x^{1} x^{2}) + 3 x^{2} (- 9 x^{2})$

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

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} + 3 \cdot - 7 x^{1 + 2} + 3 x^{2} (- 9 x^{2})$

Add $1$ and $2$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} + 3 \cdot - 7 x^{3} + 3 x^{2} (- 9 x^{2})$

Multiply $3$ by $- 7$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} + 3 x^{2} (- 9 x^{2})$

Rewrite using the commutative property of multiplication.

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} + 3 \cdot - 9 x^{2} x^{2}$

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

Move $x^{2}$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} + 3 \cdot - 9 (x^{2} x^{2})$

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

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} + 3 \cdot - 9 x^{2 + 2}$

Add $2$ and $2$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} + 3 \cdot - 9 x^{4}$

Multiply $3$ by $- 9$ .

$2 - 7 x - 9 x^{2} + 8 x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} - 27 x^{4}$

Simplify by adding terms.

Add $- 7 x$ and $8 x$ .

$2 - 9 x^{2} + x - 28 x^{2} - 36 x^{3} + 6 x^{2} - 21 x^{3} - 27 x^{4}$

Subtract $28 x^{2}$ from $- 9 x^{2}$ .

$2 - 37 x^{2} + x - 36 x^{3} + 6 x^{2} - 21 x^{3} - 27 x^{4}$

Add $- 37 x^{2}$ and $6 x^{2}$ .

$2 - 31 x^{2} + x - 36 x^{3} - 21 x^{3} - 27 x^{4}$

Subtract $21 x^{3}$ from $- 36 x^{3}$ .

$2 - 31 x^{2} + x - 57 x^{3} - 27 x^{4}$

Simplify the expression.

Move $2$ .

$- 31 x^{2} + x - 57 x^{3} - 27 x^{4} + 2$

Move $x$ .

$- 31 x^{2} - 57 x^{3} - 27 x^{4} + x + 2$

Move $- 31 x^{2}$ .

$- 57 x^{3} - 27 x^{4} - 31 x^{2} + x + 2$

Reorder $- 57 x^{3}$ and $- 27 x^{4}$ .

$- 27 x^{4} - 57 x^{3} - 31 x^{2} + x + 2$

Simplify (1+4x+3x^2)(2-7x-9x^2)

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