80=4x^2

Solution for 80=4x^2 equation:

Simplifying
80 = 4x2

Solving
80 = 4x2

Solving for variable 'x'.

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

Add '-4x2' to each side of the equation.
80 + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
80 + -4x2 = 0

Add '-80' to each side of the equation.
80 + -80 + -4x2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -4x2 = 0 + -80
-4x2 = 0 + -80

Combine like terms: 0 + -80 = -80
-4x2 = -80

Divide each side by '-4'.
x2 = 20

Simplifying
x2 = 20

Take the square root of each side:
x = {-4.472135955, 4.472135955}