(9x+8)(-9x+8)=

Solution for (9x+8)(-9x+8)= equation:

Simplifying
(9x + 8)(-9x + 8) = 0

Reorder the terms:
(8 + 9x)(-9x + 8) = 0

Reorder the terms:
(8 + 9x)(8 + -9x) = 0

Multiply (8 + 9x) * (8 + -9x)
(8(8 + -9x) + 9x * (8 + -9x)) = 0
((8 * 8 + -9x * 8) + 9x * (8 + -9x)) = 0
((64 + -72x) + 9x * (8 + -9x)) = 0
(64 + -72x + (8 * 9x + -9x * 9x)) = 0
(64 + -72x + (72x + -81x2)) = 0

Combine like terms: -72x + 72x = 0
(64 + 0 + -81x2) = 0
(64 + -81x2) = 0

Solving
64 + -81x2 = 0

Solving for variable 'x'.

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

Add '-64' to each side of the equation.
64 + -64 + -81x2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -81x2 = 0 + -64
-81x2 = 0 + -64

Combine like terms: 0 + -64 = -64
-81x2 = -64

Divide each side by '-81'.
x2 = 0.7901234568

Simplifying
x2 = 0.7901234568

Take the square root of each side:
x = {-0.888888889, 0.888888889}