2x^2-4-240=0

Solution for 2x^2-4-240=0 equation:

Simplifying
2x2 + -4 + -240 = 0

Reorder the terms:
-4 + -240 + 2x2 = 0

Combine like terms: -4 + -240 = -244
-244 + 2x2 = 0

Solving
-244 + 2x2 = 0

Solving for variable 'x'.

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

Add '244' to each side of the equation.
-244 + 244 + 2x2 = 0 + 244

Combine like terms: -244 + 244 = 0
0 + 2x2 = 0 + 244
2x2 = 0 + 244

Combine like terms: 0 + 244 = 244
2x2 = 244

Divide each side by '2'.
x2 = 122

Simplifying
x2 = 122

Take the square root of each side:
x = {-11.045361017, 11.045361017}