Simplify -7(-a^2)(-b^3)

$- 7 (- a^{2}) (- b^{3})$

Step 1

Multiply $- 1$ by $- 7$ .

$7 a^{2} (- b^{3})$

Step 2

Rewrite using the commutative property of multiplication.

$7 \cdot - 1 a^{2} b^{3}$

Step 3

Multiply $7$ by $- 1$ .

$- 7 a^{2} b^{3}$