x^2-8=20

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Solution for x^2-8=20 equation: 


Simplifying
x2 + -8 = 20

Reorder the terms:
-8 + x2 = 20

Solving
-8 + x2 = 20

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 = 20 + 8

Combine like terms: -8 + 8 = 0
0 + x2 = 20 + 8
x2 = 20 + 8

Combine like terms: 20 + 8 = 28
x2 = 28

Simplifying
x2 = 28

Take the square root of each side:
x = {-5.291502622, 5.291502622}

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