2x^2-3=20

Solution for 2x^2-3=20 equation:

Simplifying
2x2 + -3 = 20

Reorder the terms:
-3 + 2x2 = 20

Solving
-3 + 2x2 = 20

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 2x2 = 20 + 3

Combine like terms: -3 + 3 = 0
0 + 2x2 = 20 + 3
2x2 = 20 + 3

Combine like terms: 20 + 3 = 23
2x2 = 23

Divide each side by '2'.
x2 = 11.5

Simplifying
x2 = 11.5

Take the square root of each side:
x = {-3.391164992, 3.391164992}