8x^2-20=0

Solution for 8x^2-20=0 equation:

Simplifying
8x2 + -20 = 0

Reorder the terms:
-20 + 8x2 = 0

Solving
-20 + 8x2 = 0

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + 20 + 8x2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 8x2 = 0 + 20
8x2 = 0 + 20

Combine like terms: 0 + 20 = 20
8x2 = 20

Divide each side by '8'.
x2 = 2.5

Simplifying
x2 = 2.5

Take the square root of each side:
x = {-1.58113883, 1.58113883}