x^2-2=18

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Solution for x^2-2=18 equation: 


Simplifying
x2 + -2 = 18

Reorder the terms:
-2 + x2 = 18

Solving
-2 + x2 = 18

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + x2 = 18 + 2

Combine like terms: -2 + 2 = 0
0 + x2 = 18 + 2
x2 = 18 + 2

Combine like terms: 18 + 2 = 20
x2 = 20

Simplifying
x2 = 20

Take the square root of each side:
x = {-4.472135955, 4.472135955}

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