x^2-8=9

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Solution for x^2-8=9 equation: 


Simplifying
x2 + -8 = 9

Reorder the terms:
-8 + x2 = 9

Solving
-8 + x2 = 9

Solving for variable 'x'.

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

Add '8' to each side of the equation.
-8 + 8 + x2 = 9 + 8

Combine like terms: -8 + 8 = 0
0 + x2 = 9 + 8
x2 = 9 + 8

Combine like terms: 9 + 8 = 17
x2 = 17

Simplifying
x2 = 17

Take the square root of each side:
x = {-4.123105626, 4.123105626}

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