Question

Solve for x
2 + x^2 = 18​

Answer 1

4 and -4

Explanation:

To solve, just isolate x

2+x^2=18

subtract both sides of the equation by 2

x^2=16

find the square root of 16

(remember, no matter if a number is positive or negative, if it is squared, it automatically becomes positive)

to get:

x=4

and

x= -4

Answer 2

16

Explanation: