Question

Which equation has both 7 and -7 as possible values of y ?
Question 3 options:

y³=42

y²=42

y³=49

y²=49

Answer 1

very old question but to solve for y^2 you'd take the square root and to solve for y^3 you'd take the cube root

so see whichever choice gives you -7 and 7 as the appropriate result