Question

Solve y = x^2 - 18 for x.

O A. x= ty - 18
O B. x= y +18
O c. x= y - 18
O D. x= + y + 18

Answer 1

x = √y+18

Explanation:

Given

`y = x^2-18`

In order to solve the equation for x, we have to isolate x on one side of the equation

So,

`y+18 = x^2 -18 + 18\\y + 18 = x^2`

We have to find the value for x, so taking square root on both sides

`√(x^2) = √(y+18)`

Solving the squre root

x =
`x = √(y + 18)`

Hence,

x = √y+18 is the correct answer ..