2x^2+21=180

Solution for 2x^2+21=180 equation:

Simplifying
2x2 + 21 = 180

Reorder the terms:
21 + 2x2 = 180

Solving
21 + 2x2 = 180

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 2x2 = 180 + -21

Combine like terms: 21 + -21 = 0
0 + 2x2 = 180 + -21
2x2 = 180 + -21

Combine like terms: 180 + -21 = 159
2x2 = 159

Divide each side by '2'.
x2 = 79.5

Simplifying
x2 = 79.5

Take the square root of each side:
x = {-8.91627725, 8.91627725}