4x^2-12-40=0

Solution for 4x^2-12-40=0 equation:

Simplifying
4x2 + -12 + -40 = 0

Reorder the terms:
-12 + -40 + 4x2 = 0

Combine like terms: -12 + -40 = -52
-52 + 4x2 = 0

Solving
-52 + 4x2 = 0

Solving for variable 'x'.

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

Add '52' to each side of the equation.
-52 + 52 + 4x2 = 0 + 52

Combine like terms: -52 + 52 = 0
0 + 4x2 = 0 + 52
4x2 = 0 + 52

Combine like terms: 0 + 52 = 52
4x2 = 52

Divide each side by '4'.
x2 = 13

Simplifying
x2 = 13

Take the square root of each side:
x = {-3.605551275, 3.605551275}