121-9x^2=

Solution for 121-9x^2= equation:

Simplifying
121 + -9x2 = 0

Solving
121 + -9x2 = 0

Solving for variable 'x'.

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

Add '-121' to each side of the equation.
121 + -121 + -9x2 = 0 + -121

Combine like terms: 121 + -121 = 0
0 + -9x2 = 0 + -121
-9x2 = 0 + -121

Combine like terms: 0 + -121 = -121
-9x2 = -121

Divide each side by '-9'.
x2 = 13.44444444

Simplifying
x2 = 13.44444444

Take the square root of each side:
x = {-3.666666666, 3.666666666}