X^2-1=19

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Solution for X^2-1=19 equation: 


Simplifying
X2 + -1 = 19

Reorder the terms:
-1 + X2 = 19

Solving
-1 + X2 = 19

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 = 19 + 1

Combine like terms: -1 + 1 = 0
0 + X2 = 19 + 1
X2 = 19 + 1

Combine like terms: 19 + 1 = 20
X2 = 20

Simplifying
X2 = 20

Take the square root of each side:
X = {-4.472135955, 4.472135955}

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