Simplify -15x^2(x^5y^4)

$- 15 x^{2} (x^{5} y^{4})$

Step 1

Move $x^{5}$ .

$- 15 (x^{5} x^{2}) y^{4}$

Step 2

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

$- 15 x^{5 + 2} y^{4}$

Step 3

Add $5$ and $2$ .

$- 15 x^{7} y^{4}$