Basic Math Examples

$(21 m^{2}) (- 15 m^{2})$

Step 1

Rewrite using the commutative property of multiplication.

$21 \cdot - 15 m^{2} m^{2}$

Step 2

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

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Step 2.1

Move $m^{2}$ .

$21 \cdot - 15 (m^{2} m^{2})$

Step 2.2

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

$21 \cdot - 15 m^{2 + 2}$

Step 2.3

Add $2$ and $2$ .

$21 \cdot - 15 m^{4}$

Step 3

Multiply $21$ by $- 15$ .

$- 315 m^{4}$