x^2-9-27=0

Solution for x^2-9-27=0 equation:

Simplifying
x2 + -9 + -27 = 0

Reorder the terms:
-9 + -27 + x2 = 0

Combine like terms: -9 + -27 = -36
-36 + x2 = 0

Solving
-36 + x2 = 0

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + x2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + x2 = 0 + 36
x2 = 0 + 36

Combine like terms: 0 + 36 = 36
x2 = 36

Simplifying
x2 = 36

Take the square root of each side:
x = {-6, 6}