-4x^2+80=0

Solution for -4x^2+80=0 equation:

Simplifying
-4x2 + 80 = 0

Reorder the terms:
80 + -4x2 = 0

Solving
80 + -4x2 = 0

Solving for variable 'x'.

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

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}