400-2x^2=0

Solution for 400-2x^2=0 equation:

Simplifying
400 + -2x2 = 0

Solving
400 + -2x2 = 0

Solving for variable 'x'.

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

Add '-400' to each side of the equation.
400 + -400 + -2x2 = 0 + -400

Combine like terms: 400 + -400 = 0
0 + -2x2 = 0 + -400
-2x2 = 0 + -400

Combine like terms: 0 + -400 = -400
-2x2 = -400

Divide each side by '-2'.
x2 = 200

Simplifying
x2 = 200

Take the square root of each side:
x = {-14.142135624, 14.142135624}