Question

Solve x^2=144
72
12
±12
-12

Answer 1

My solutions were 12 and -12 but both are answers so i'm not sure which one is correct

Answer 2

can someone please explain how I should figure this out?

Answer 3

Simplifying
x2 = 144

Solving
x2 = 144

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Simplifying
x2 = 144

Take the square root of each side:
x = {-12, 12}

Answer 4

how do i tell if it's 12 or -12?

Answer 5

@fluttershyK

Answer 6

It is gonna be both +12 and -12
You can just write it is

Answer 7

Since it is both you would choose C since it is an option of meaning both plus and minus.

Answer 8

because its both that's why it looks like this {-12, 12}

Answer 9

okay I get it now thank you!

Answer 10

@563blackghost thanks for the medal

Answer 11

You deserved it with a wonderful explanation ^^