2x^2-221=0

Solution for 2x^2-221=0 equation:

Simplifying
2x2 + -221 = 0

Reorder the terms:
-221 + 2x2 = 0

Solving
-221 + 2x2 = 0

Solving for variable 'x'.

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

Add '221' to each side of the equation.
-221 + 221 + 2x2 = 0 + 221

Combine like terms: -221 + 221 = 0
0 + 2x2 = 0 + 221
2x2 = 0 + 221

Combine like terms: 0 + 221 = 221
2x2 = 221

Divide each side by '2'.
x2 = 110.5

Simplifying
x2 = 110.5

Take the square root of each side:
x = {-10.511898021, 10.511898021}