Algebra Examples

$(3 m^{2} - 4 m + 1) (2 m^{2} + 5 m - 9)$

Step 1

To write a polynomial in standard form, simplify and then arrange the terms in descending order.

$a x^{2} + b x + c$

Step 2

Expand $(3 m^{2} - 4 m + 1) (2 m^{2} + 5 m - 9)$ by multiplying each term in the first expression by each term in the second expression.

$3 m^{2} (2 m^{2}) + 3 m^{2} (5 m) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3

Simplify terms.

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Step 3.1

Simplify each term.

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Step 3.1.1

Rewrite using the commutative property of multiplication.

$3 \cdot 2 m^{2} m^{2} + 3 m^{2} (5 m) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.2

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

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Step 3.1.2.1

Move $m^{2}$ .

$3 \cdot 2 (m^{2} m^{2}) + 3 m^{2} (5 m) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.2.2

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

$3 \cdot 2 m^{2 + 2} + 3 m^{2} (5 m) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.2.3

Add $2$ and $2$ .

$3 \cdot 2 m^{4} + 3 m^{2} (5 m) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.3

Multiply $3$ by $2$ .

$6 m^{4} + 3 m^{2} (5 m) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.4

Rewrite using the commutative property of multiplication.

$6 m^{4} + 3 \cdot 5 m^{2} m + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.5

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

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Step 3.1.5.1

Move $m$ .

$6 m^{4} + 3 \cdot 5 (m \cdot m^{2}) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.5.2

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

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Step 3.1.5.2.1

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

$6 m^{4} + 3 \cdot 5 (m^{1} m^{2}) + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.5.2.2

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

$6 m^{4} + 3 \cdot 5 m^{1 + 2} + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.5.3

Add $1$ and $2$ .

$6 m^{4} + 3 \cdot 5 m^{3} + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.6

Multiply $3$ by $5$ .

$6 m^{4} + 15 m^{3} + 3 m^{2} \cdot - 9 - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.7

Multiply $- 9$ by $3$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 4 m (2 m^{2}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.8

Rewrite using the commutative property of multiplication.

$6 m^{4} + 15 m^{3} - 27 m^{2} - 4 \cdot 2 m \cdot m^{2} - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.9

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

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Step 3.1.9.1

Move $m^{2}$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 4 \cdot 2 (m^{2} m) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.9.2

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

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Step 3.1.9.2.1

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

$6 m^{4} + 15 m^{3} - 27 m^{2} - 4 \cdot 2 (m^{2} m^{1}) - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.9.2.2

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

$6 m^{4} + 15 m^{3} - 27 m^{2} - 4 \cdot 2 m^{2 + 1} - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.9.3

Add $2$ and $1$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 4 \cdot 2 m^{3} - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.10

Multiply $- 4$ by $2$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 4 m (5 m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.11

Rewrite using the commutative property of multiplication.

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 4 \cdot 5 m \cdot m - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.12

Multiply $m$ by $m$ by adding the exponents.

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Step 3.1.12.1

Move $m$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 4 \cdot 5 (m \cdot m) - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.12.2

Multiply $m$ by $m$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 4 \cdot 5 m^{2} - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.13

Multiply $- 4$ by $5$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 20 m^{2} - 4 m \cdot - 9 + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.14

Multiply $- 9$ by $- 4$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 20 m^{2} + 36 m + 1 (2 m^{2}) + 1 (5 m) + 1 \cdot - 9$

Step 3.1.15

Multiply $2 m^{2}$ by $1$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 20 m^{2} + 36 m + 2 m^{2} + 1 (5 m) + 1 \cdot - 9$

Step 3.1.16

Multiply $5 m$ by $1$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 20 m^{2} + 36 m + 2 m^{2} + 5 m + 1 \cdot - 9$

Step 3.1.17

Multiply $- 9$ by $1$ .

$6 m^{4} + 15 m^{3} - 27 m^{2} - 8 m^{3} - 20 m^{2} + 36 m + 2 m^{2} + 5 m - 9$

Step 3.2

Simplify by adding terms.

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Step 3.2.1

Subtract $8 m^{3}$ from $15 m^{3}$ .

$6 m^{4} + 7 m^{3} - 27 m^{2} - 20 m^{2} + 36 m + 2 m^{2} + 5 m - 9$

Step 3.2.2

Subtract $20 m^{2}$ from $- 27 m^{2}$ .

$6 m^{4} + 7 m^{3} - 47 m^{2} + 36 m + 2 m^{2} + 5 m - 9$

Step 3.2.3

Add $- 47 m^{2}$ and $2 m^{2}$ .

$6 m^{4} + 7 m^{3} - 45 m^{2} + 36 m + 5 m - 9$

Step 3.2.4

Add $36 m$ and $5 m$ .

$6 m^{4} + 7 m^{3} - 45 m^{2} + 41 m - 9$