x^2-1=9

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Solution for x^2-1=9 equation: 


Simplifying
x2 + -1 = 9

Reorder the terms:
-1 + x2 = 9

Solving
-1 + x2 = 9

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + x2 = 9 + 1

Combine like terms: -1 + 1 = 0
0 + x2 = 9 + 1
x2 = 9 + 1

Combine like terms: 9 + 1 = 10
x2 = 10

Simplifying
x2 = 10

Take the square root of each side:
x = {-3.16227766, 3.16227766}

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