Question

B= -4 What’s (4b)^2 =

Answer 1

What ever is inside the brackets will not be affected by what you do to remove the brackets. That's because the number of minus signs is even.

(4 b) ^2 = (4 * (-4) * (-4) ) = 4 * (-4 * -4) = 4 * 4 * 4 = 64

Answer 2

First, substitute -4 for b in the expression:
(4•-4)^2

Simplify:
(-16)^2
-16•-16
256

256 is your final answer!