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

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

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

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

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

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

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

Solving
-64 + 81b2 = 0

Solving for variable 'b'.

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

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

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

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

Divide each side by '81'.
b2 = 0.7901234568

Simplifying
b2 = 0.7901234568

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