3x^2-20-x^2=0

Solution for 3x^2-20-x^2=0 equation:

Simplifying
3x2 + -20 + -1x2 = 0

Reorder the terms:
-20 + 3x2 + -1x2 = 0

Combine like terms: 3x2 + -1x2 = 2x2
-20 + 2x2 = 0

Solving
-20 + 2x2 = 0

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + 20 + 2x2 = 0 + 20

Combine like terms: -20 + 20 = 0
0 + 2x2 = 0 + 20
2x2 = 0 + 20

Combine like terms: 0 + 20 = 20
2x2 = 20

Divide each side by '2'.
x2 = 10

Simplifying
x2 = 10

Take the square root of each side:
x = {-3.16227766, 3.16227766}