Question

evaluate the expression when y=-2

-8y^2=

Answer 1

You plug in -2 for y. So you multiply -2 by -8 and raise it to the second power.
-8(-2)^2 = 16^2 = 256

Answer 2

-8(y)^2
=-8$(-2)^{2}$
=-8(4)
=-32