40x^2-20=0

Solution for 40x^2-20=0 equation:

Simplifying
40x2 + -20 = 0

Reorder the terms:
-20 + 40x2 = 0

Solving
-20 + 40x2 = 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 + 40x2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 40x2 = 0 + 20
40x2 = 0 + 20

Combine like terms: 0 + 20 = 20
40x2 = 20

Divide each side by '40'.
x2 = 0.5

Simplifying
x2 = 0.5

Take the square root of each side:
x = {-0.707106781, 0.707106781}