X^2-16=3

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Solution for X^2-16=3 equation: 


Simplifying
X2 + -16 = 3

Reorder the terms:
-16 + X2 = 3

Solving
-16 + X2 = 3

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 = 3 + 16

Combine like terms: -16 + 16 = 0
0 + X2 = 3 + 16
X2 = 3 + 16

Combine like terms: 3 + 16 = 19
X2 = 19

Simplifying
X2 = 19

Take the square root of each side:
X = {-4.358898944, 4.358898944}

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