x^2-13=8

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Solution for x^2-13=8 equation: 


Simplifying
x2 + -13 = 8

Reorder the terms:
-13 + x2 = 8

Solving
-13 + x2 = 8

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + x2 = 8 + 13

Combine like terms: -13 + 13 = 0
0 + x2 = 8 + 13
x2 = 8 + 13

Combine like terms: 8 + 13 = 21
x2 = 21

Simplifying
x2 = 21

Take the square root of each side:
x = {-4.582575695, 4.582575695}

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