x^2-9+8=12

Solution for x^2-9+8=12 equation:

Simplifying
x2 + -9 + 8 = 12

Reorder the terms:
-9 + 8 + x2 = 12

Combine like terms: -9 + 8 = -1
-1 + x2 = 12

Solving
-1 + x2 = 12

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + x2 = 12 + 1

Combine like terms: -1 + 1 = 0
0 + x2 = 12 + 1
x2 = 12 + 1

Combine like terms: 12 + 1 = 13
x2 = 13

Simplifying
x2 = 13

Take the square root of each side:
x = {-3.605551275, 3.605551275}