2x*x+9=225

Solution for 2x*x+9=225 equation:

Simplifying
2x * x + 9 = 225

Multiply x * x
2x2 + 9 = 225

Reorder the terms:
9 + 2x2 = 225

Solving
9 + 2x2 = 225

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 2x2 = 225 + -9

Combine like terms: 9 + -9 = 0
0 + 2x2 = 225 + -9
2x2 = 225 + -9

Combine like terms: 225 + -9 = 216
2x2 = 216

Divide each side by '2'.
x2 = 108

Simplifying
x2 = 108

Take the square root of each side:
x = {-10.392304845, 10.392304845}