2x^2-28-12=0

Solution for 2x^2-28-12=0 equation:

Simplifying
2x2 + -28 + -12 = 0

Reorder the terms:
-28 + -12 + 2x2 = 0

Combine like terms: -28 + -12 = -40
-40 + 2x2 = 0

Solving
-40 + 2x2 = 0

Solving for variable 'x'.

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

Add '40' to each side of the equation.
-40 + 40 + 2x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + 2x2 = 0 + 40
2x2 = 0 + 40

Combine like terms: 0 + 40 = 40
2x2 = 40

Divide each side by '2'.
x2 = 20

Simplifying
x2 = 20

Take the square root of each side:
x = {-4.472135955, 4.472135955}