x^2+15-54=0

Solution for x^2+15-54=0 equation:

Simplifying
x2 + 15 + -54 = 0

Reorder the terms:
15 + -54 + x2 = 0

Combine like terms: 15 + -54 = -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}