(4-9x)(4+9x)=0

Solution for (4-9x)(4+9x)=0 equation:

Simplifying
(4 + -9x)(4 + 9x) = 0

Multiply (4 + -9x) * (4 + 9x)
(4(4 + 9x) + -9x * (4 + 9x)) = 0
((4 * 4 + 9x * 4) + -9x * (4 + 9x)) = 0
((16 + 36x) + -9x * (4 + 9x)) = 0
(16 + 36x + (4 * -9x + 9x * -9x)) = 0
(16 + 36x + (-36x + -81x2)) = 0

Combine like terms: 36x + -36x = 0
(16 + 0 + -81x2) = 0
(16 + -81x2) = 0

Solving
16 + -81x2 = 0

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + -81x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -81x2 = 0 + -16
-81x2 = 0 + -16

Combine like terms: 0 + -16 = -16
-81x2 = -16

Divide each side by '-81'.
x2 = 0.1975308642

Simplifying
x2 = 0.1975308642

Take the square root of each side:
x = {-0.444444444, 0.444444444}