400x^2-196=0

Solution for 400x^2-196=0 equation:

Simplifying
400x2 + -196 = 0

Reorder the terms:
-196 + 400x2 = 0

Solving
-196 + 400x2 = 0

Solving for variable 'x'.

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

Add '196' to each side of the equation.
-196 + 196 + 400x2 = 0 + 196

Combine like terms: -196 + 196 = 0
0 + 400x2 = 0 + 196
400x2 = 0 + 196

Combine like terms: 0 + 196 = 196
400x2 = 196

Divide each side by '400'.
x2 = 0.49

Simplifying
x2 = 0.49

Take the square root of each side:
x = {-0.7, 0.7}