10x^2-90=

Solution for 10x^2-90= equation:

Simplifying
10x2 + -90 = 0

Reorder the terms:
-90 + 10x2 = 0

Solving
-90 + 10x2 = 0

Solving for variable 'x'.

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

Add '90' to each side of the equation.
-90 + 90 + 10x2 = 0 + 90

Combine like terms: -90 + 90 = 0
0 + 10x2 = 0 + 90
10x2 = 0 + 90

Combine like terms: 0 + 90 = 90
10x2 = 90

Divide each side by '10'.
x2 = 9

Simplifying
x2 = 9

Take the square root of each side:
x = {-3, 3}