x^2-16=-1

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Solution for x^2-16=-1 equation: 


Simplifying
x2 + -16 = -1

Reorder the terms:
-16 + x2 = -1

Solving
-16 + x2 = -1

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + x2 = -1 + 16

Combine like terms: -16 + 16 = 0
0 + x2 = -1 + 16
x2 = -1 + 16

Combine like terms: -1 + 16 = 15
x2 = 15

Simplifying
x2 = 15

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

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