x^2+6-9=81

Solution for x^2+6-9=81 equation:

Simplifying
x2 + 6 + -9 = 81

Reorder the terms:
6 + -9 + x2 = 81

Combine like terms: 6 + -9 = -3
-3 + x2 = 81

Solving
-3 + x2 = 81

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + x2 = 81 + 3

Combine like terms: -3 + 3 = 0
0 + x2 = 81 + 3
x2 = 81 + 3

Combine like terms: 81 + 3 = 84
x2 = 84

Simplifying
x2 = 84

Take the square root of each side:
x = {-9.16515139, 9.16515139}