2x^2-40=248

Solution for 2x^2-40=248 equation:

Simplifying
2x2 + -40 = 248

Reorder the terms:
-40 + 2x2 = 248

Solving
-40 + 2x2 = 248

Solving for variable 'x'.

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

Add '40' to each side of the equation.
-40 + 40 + 2x2 = 248 + 40

Combine like terms: -40 + 40 = 0
0 + 2x2 = 248 + 40
2x2 = 248 + 40

Combine like terms: 248 + 40 = 288
2x2 = 288

Divide each side by '2'.
x2 = 144

Simplifying
x2 = 144

Take the square root of each side:
x = {-12, 12}