40=9x^2

Solution for 40=9x^2 equation:

Simplifying
40 = 9x2

Solving
40 = 9x2

Solving for variable 'x'.

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

Add '-9x2' to each side of the equation.
40 + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
40 + -9x2 = 0

Add '-40' to each side of the equation.
40 + -40 + -9x2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -9x2 = 0 + -40
-9x2 = 0 + -40

Combine like terms: 0 + -40 = -40
-9x2 = -40

Divide each side by '-9'.
x2 = 4.444444444

Simplifying
x2 = 4.444444444

Take the square root of each side:
x = {-2.108185107, 2.108185107}