90=5x^2

Solution for 90=5x^2 equation:

Simplifying
90 = 5x2

Solving
90 = 5x2

Solving for variable 'x'.

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

Add '-5x2' to each side of the equation.
90 + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
90 + -5x2 = 0

Add '-90' to each side of the equation.
90 + -90 + -5x2 = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -5x2 = 0 + -90
-5x2 = 0 + -90

Combine like terms: 0 + -90 = -90
-5x2 = -90

Divide each side by '-5'.
x2 = 18

Simplifying
x2 = 18

Take the square root of each side:
x = {-4.242640687, 4.242640687}