x*x-2=31

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Solution for x*x-2=31 equation: 


Simplifying
x * x + -2 = 31

Multiply x * x
x2 + -2 = 31

Reorder the terms:
-2 + x2 = 31

Solving
-2 + x2 = 31

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 = 31 + 2

Combine like terms: -2 + 2 = 0
0 + x2 = 31 + 2
x2 = 31 + 2

Combine like terms: 31 + 2 = 33
x2 = 33

Simplifying
x2 = 33

Take the square root of each side:
x = {-5.744562647, 5.744562647}

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