x*x-6=15

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Solution for x*x-6=15 equation: 


Simplifying
x * x + -6 = 15

Multiply x * x
x2 + -6 = 15

Reorder the terms:
-6 + x2 = 15

Solving
-6 + x2 = 15

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + x2 = 15 + 6

Combine like terms: -6 + 6 = 0
0 + x2 = 15 + 6
x2 = 15 + 6

Combine like terms: 15 + 6 = 21
x2 = 21

Simplifying
x2 = 21

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

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