2x^2+3-20=0

Solution for 2x^2+3-20=0 equation:

Simplifying
2x2 + 3 + -20 = 0

Reorder the terms:
3 + -20 + 2x2 = 0

Combine like terms: 3 + -20 = -17
-17 + 2x2 = 0

Solving
-17 + 2x2 = 0

Solving for variable 'x'.

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

Add '17' to each side of the equation.
-17 + 17 + 2x2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + 2x2 = 0 + 17
2x2 = 0 + 17

Combine like terms: 0 + 17 = 17
2x2 = 17

Divide each side by '2'.
x2 = 8.5

Simplifying
x2 = 8.5

Take the square root of each side:
x = {-2.915475947, 2.915475947}