x^2-4=20

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Solution for x^2-4=20 equation: 


Simplifying
x2 + -4 = 20

Reorder the terms:
-4 + x2 = 20

Solving
-4 + x2 = 20

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + x2 = 20 + 4

Combine like terms: -4 + 4 = 0
0 + x2 = 20 + 4
x2 = 20 + 4

Combine like terms: 20 + 4 = 24
x2 = 24

Simplifying
x2 = 24

Take the square root of each side:
x = {-4.898979486, 4.898979486}

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