Question

Solve y = x^2 - 18 for x.

Answer 1

Answer:

x = √y+18

Step-by-step 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

$\sqrt{x^2} = \sqrt{y+18}$

Solving the squre root

x = $x = \sqrt{y + 18}$

Hence,

x = √y+18 is the correct answer ..