x^2-8=7

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Solution for x^2-8=7 equation: 


Simplifying
x2 + -8 = 7

Reorder the terms:
-8 + x2 = 7

Solving
-8 + x2 = 7

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 = 7 + 8

Combine like terms: -8 + 8 = 0
0 + x2 = 7 + 8
x2 = 7 + 8

Combine like terms: 7 + 8 = 15
x2 = 15

Simplifying
x2 = 15

Take the square root of each side:
x = {-3.872983346, 3.872983346}

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