4x^2-12-91=0

Solution for 4x^2-12-91=0 equation:

Simplifying
4x2 + -12 + -91 = 0

Reorder the terms:
-12 + -91 + 4x2 = 0

Combine like terms: -12 + -91 = -103
-103 + 4x2 = 0

Solving
-103 + 4x2 = 0

Solving for variable 'x'.

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

Add '103' to each side of the equation.
-103 + 103 + 4x2 = 0 + 103

Combine like terms: -103 + 103 = 0
0 + 4x2 = 0 + 103
4x2 = 0 + 103

Combine like terms: 0 + 103 = 103
4x2 = 103

Divide each side by '4'.
x2 = 25.75

Simplifying
x2 = 25.75

Take the square root of each side:
x = {-5.074445783, 5.074445783}