2x^2-7-15=0

Solution for 2x^2-7-15=0 equation:

Simplifying
2x2 + -7 + -15 = 0

Reorder the terms:
-7 + -15 + 2x2 = 0

Combine like terms: -7 + -15 = -22
-22 + 2x2 = 0

Solving
-22 + 2x2 = 0

Solving for variable 'x'.

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

Add '22' to each side of the equation.
-22 + 22 + 2x2 = 0 + 22

Combine like terms: -22 + 22 = 0
0 + 2x2 = 0 + 22
2x2 = 0 + 22

Combine like terms: 0 + 22 = 22
2x2 = 22

Divide each side by '2'.
x2 = 11

Simplifying
x2 = 11

Take the square root of each side:
x = {-3.31662479, 3.31662479}