=(9x+6)(9x-6)

Solution for =(9x+6)(9x-6) equation:

Simplifying
0 = (9x + 6)(9x + -6)

Reorder the terms:
0 = (6 + 9x)(9x + -6)

Reorder the terms:
0 = (6 + 9x)(-6 + 9x)

Multiply (6 + 9x) * (-6 + 9x)
0 = (6(-6 + 9x) + 9x * (-6 + 9x))
0 = ((-6 * 6 + 9x * 6) + 9x * (-6 + 9x))
0 = ((-36 + 54x) + 9x * (-6 + 9x))
0 = (-36 + 54x + (-6 * 9x + 9x * 9x))
0 = (-36 + 54x + (-54x + 81x2))

Combine like terms: 54x + -54x = 0
0 = (-36 + 0 + 81x2)
0 = (-36 + 81x2)

Solving
0 = -36 + 81x2

Solving for variable 'x'.

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

Add '-81x2' to each side of the equation.
0 + -81x2 = -36 + 81x2 + -81x2
Remove the zero:
-81x2 = -36 + 81x2 + -81x2

Combine like terms: 81x2 + -81x2 = 0
-81x2 = -36 + 0
-81x2 = -36

Divide each side by '-81'.
x2 = 0.4444444444

Simplifying
x2 = 0.4444444444

Take the square root of each side:
x = {-0.666666667, 0.666666667}