Question

Why do i need the ± sign before the answer? my teacher said it needed to be there but i'm not sure why it has to be or when to use it. can someone pls explain why i need the ± sign? thank u sm

i attached the work i did for the problem, the equation was y = 2/3x^2-5 and i had to find the inverse of it​

Answer 1

THe reason u need the ± is so that way u know that it is both neg and positive also it helps the teacher grade the work.

Hopefully this helps u out if u need more help pls feel free to text me back

Explanation: