x*x-4=240

Solution for x*x-4=240 equation:

Simplifying
x * x + -4 = 240

Multiply x * x
x2 + -4 = 240

Reorder the terms:
-4 + x2 = 240

Solving
-4 + x2 = 240

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + x2 = 240 + 4

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

Combine like terms: 240 + 4 = 244
x2 = 244

Simplifying
x2 = 244

Take the square root of each side:
x = {-15.620499352, 15.620499352}