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Simplifying
(9 + -8x)(9 + 8x) = 0
Multiply (9 + -8x) * (9 + 8x)
(9(9 + 8x) + -8x * (9 + 8x)) = 0
((9 * 9 + 8x * 9) + -8x * (9 + 8x)) = 0
((81 + 72x) + -8x * (9 + 8x)) = 0
(81 + 72x + (9 * -8x + 8x * -8x)) = 0
(81 + 72x + (-72x + -64x2)) = 0
Combine like terms: 72x + -72x = 0
(81 + 0 + -64x2) = 0
(81 + -64x2) = 0
Solving
81 + -64x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-81' to each side of the equation.
81 + -81 + -64x2 = 0 + -81
Combine like terms: 81 + -81 = 0
0 + -64x2 = 0 + -81
-64x2 = 0 + -81
Combine like terms: 0 + -81 = -81
-64x2 = -81
Divide each side by '-64'.
x2 = 1.265625
Simplifying
x2 = 1.265625
Take the square root of each side:
x = {-1.125, 1.125}
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