Question

please explain in step by step. ​

Answer 1

Answer:

a.

${( - 3x)}^{2} = (- 3x) \times ( - 3x)$

= - 3 × - 3 × x × x

=

$9 {x}^{2}$

b.

${( - 4y)}^{3} = (- 4y) \times (- 4y) \times ( - 4y)$

= - 4 × - 4 × - 4 × y × y × y

=

$- 64 {y}^{3}$

Cheers

Answer 2

Answer:

a. -9x^2 b. -64y^3........