X^2-8-20=0

Solution for X^2-8-20=0 equation:

Simplifying
X2 + -8 + -20 = 0

Reorder the terms:
-8 + -20 + X2 = 0

Combine like terms: -8 + -20 = -28
-28 + X2 = 0

Solving
-28 + X2 = 0

Solving for variable 'X'.

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

Add '28' to each side of the equation.
-28 + 28 + X2 = 0 + 28

Combine like terms: -28 + 28 = 0
0 + X2 = 0 + 28
X2 = 0 + 28

Combine like terms: 0 + 28 = 28
X2 = 28

Simplifying
X2 = 28

Take the square root of each side:
X = {-5.291502622, 5.291502622}