x^2-16-23=0

Solution for x^2-16-23=0 equation:

Simplifying
x2 + -16 + -23 = 0

Reorder the terms:
-16 + -23 + x2 = 0

Combine like terms: -16 + -23 = -39
-39 + x2 = 0

Solving
-39 + x2 = 0

Solving for variable 'x'.

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

Add '39' to each side of the equation.
-39 + 39 + x2 = 0 + 39

Combine like terms: -39 + 39 = 0
0 + x2 = 0 + 39
x2 = 0 + 39

Combine like terms: 0 + 39 = 39
x2 = 39

Simplifying
x2 = 39

Take the square root of each side:
x = {-6.244997998, 6.244997998}