Me asap which equation has both 7 and -7 as possible values of y ? y³=42 y²=42 y³=49 y²=49 which equation has both 4 and ? –4 as possible values of y ? y²=8 y³=12 y²=16 y³=64

You are expected to know (-x)*(-x) = x^2 = (x)*(x) for any value of x.

With this in mind, you expect to be looking for squares in answer to your question. You will find them.

1) y² = 49 . . . . . . . 4th selection
2) y² = 16 . . . . . . . 3rd selection