4x^2-11-20=0

Solution for 4x^2-11-20=0 equation:

Simplifying
4x2 + -11 + -20 = 0

Reorder the terms:
-11 + -20 + 4x2 = 0

Combine like terms: -11 + -20 = -31
-31 + 4x2 = 0

Solving
-31 + 4x2 = 0

Solving for variable 'x'.

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

Add '31' to each side of the equation.
-31 + 31 + 4x2 = 0 + 31

Combine like terms: -31 + 31 = 0
0 + 4x2 = 0 + 31
4x2 = 0 + 31

Combine like terms: 0 + 31 = 31
4x2 = 31

Divide each side by '4'.
x2 = 7.75

Simplifying
x2 = 7.75

Take the square root of each side:
x = {-2.783882181, 2.783882181}