89=x^2+8

Solution for 89=x^2+8 equation:

Simplifying
89 = x2 + 8

Reorder the terms:
89 = 8 + x2

Solving
89 = 8 + x2

Solving for variable 'x'.

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

Add '-1x2' to each side of the equation.
89 + -1x2 = 8 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
89 + -1x2 = 8 + 0
89 + -1x2 = 8

Add '-89' to each side of the equation.
89 + -89 + -1x2 = 8 + -89

Combine like terms: 89 + -89 = 0
0 + -1x2 = 8 + -89
-1x2 = 8 + -89

Combine like terms: 8 + -89 = -81
-1x2 = -81

Divide each side by '-1'.
x2 = 81

Simplifying
x2 = 81

Take the square root of each side:
x = {-9, 9}