2x^2+5-18=0

Solution for 2x^2+5-18=0 equation:

Simplifying
2x2 + 5 + -18 = 0

Reorder the terms:
5 + -18 + 2x2 = 0

Combine like terms: 5 + -18 = -13
-13 + 2x2 = 0

Solving
-13 + 2x2 = 0

Solving for variable 'x'.

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

Add '13' to each side of the equation.
-13 + 13 + 2x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 2x2 = 0 + 13
2x2 = 0 + 13

Combine like terms: 0 + 13 = 13
2x2 = 13

Divide each side by '2'.
x2 = 6.5

Simplifying
x2 = 6.5

Take the square root of each side:
x = {-2.549509757, 2.549509757}