(8b-9)(8b+9)=

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

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

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

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

Multiply (-9 + 8b) * (9 + 8b)
(-9(9 + 8b) + 8b * (9 + 8b)) = 0
((9 * -9 + 8b * -9) + 8b * (9 + 8b)) = 0
((-81 + -72b) + 8b * (9 + 8b)) = 0
(-81 + -72b + (9 * 8b + 8b * 8b)) = 0
(-81 + -72b + (72b + 64b2)) = 0

Combine like terms: -72b + 72b = 0
(-81 + 0 + 64b2) = 0
(-81 + 64b2) = 0

Solving
-81 + 64b2 = 0

Solving for variable 'b'.

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

Add '81' to each side of the equation.
-81 + 81 + 64b2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + 64b2 = 0 + 81
64b2 = 0 + 81

Combine like terms: 0 + 81 = 81
64b2 = 81

Divide each side by '64'.
b2 = 1.265625

Simplifying
b2 = 1.265625

Take the square root of each side:
b = {-1.125, 1.125}