x*x-87=-5

Solution for x*x-87=-5 equation:

Simplifying
x * x + -87 = -5

Multiply x * x
x2 + -87 = -5

Reorder the terms:
-87 + x2 = -5

Solving
-87 + x2 = -5

Solving for variable 'x'.

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

Add '87' to each side of the equation.
-87 + 87 + x2 = -5 + 87

Combine like terms: -87 + 87 = 0
0 + x2 = -5 + 87
x2 = -5 + 87

Combine like terms: -5 + 87 = 82
x2 = 82

Simplifying
x2 = 82

Take the square root of each side:
x = {-9.055385138, 9.055385138}