Question

Find y if y raised to power - 2=25​

Answer 1

Answer: 1/5 and -1/5


1. For
`y^(2)`


`image`

2. For
`y^(-2)`:


`image`

So answers are:
1.
`(1)/(5)`, and
2.
`-(1)/(5)`

Proof:

1. Use formula:

`image`

`image`

3. Solve:
25

So for both 1/5 and -1/5 it is answer correct.