2x^2-15-20=0

Solution for 2x^2-15-20=0 equation:

Simplifying
2x2 + -15 + -20 = 0

Reorder the terms:
-15 + -20 + 2x2 = 0

Combine like terms: -15 + -20 = -35
-35 + 2x2 = 0

Solving
-35 + 2x2 = 0

Solving for variable 'x'.

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

Add '35' to each side of the equation.
-35 + 35 + 2x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 2x2 = 0 + 35
2x2 = 0 + 35

Combine like terms: 0 + 35 = 35
2x2 = 35

Divide each side by '2'.
x2 = 17.5

Simplifying
x2 = 17.5

Take the square root of each side:
x = {-4.183300133, 4.183300133}