X^2-16-20=0

Solution for X^2-16-20=0 equation:

Simplifying
X2 + -16 + -20 = 0

Reorder the terms:
-16 + -20 + X2 = 0

Combine like terms: -16 + -20 = -36
-36 + X2 = 0

Solving
-36 + X2 = 0

Solving for variable 'X'.

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

Add '36' to each side of the equation.
-36 + 36 + X2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + X2 = 0 + 36
X2 = 0 + 36

Combine like terms: 0 + 36 = 36
X2 = 36

Simplifying
X2 = 36

Take the square root of each side:
X = {-6, 6}