(9b-2)(9b+2)=

Solution for (9b-2)(9b+2)= equation:

Simplifying
(9b + -2)(9b + 2) = 0

Reorder the terms:
(-2 + 9b)(9b + 2) = 0

Reorder the terms:
(-2 + 9b)(2 + 9b) = 0

Multiply (-2 + 9b) * (2 + 9b)
(-2(2 + 9b) + 9b * (2 + 9b)) = 0
((2 * -2 + 9b * -2) + 9b * (2 + 9b)) = 0
((-4 + -18b) + 9b * (2 + 9b)) = 0
(-4 + -18b + (2 * 9b + 9b * 9b)) = 0
(-4 + -18b + (18b + 81b2)) = 0

Combine like terms: -18b + 18b = 0
(-4 + 0 + 81b2) = 0
(-4 + 81b2) = 0

Solving
-4 + 81b2 = 0

Solving for variable 'b'.

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

Add '4' to each side of the equation.
-4 + 4 + 81b2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 81b2 = 0 + 4
81b2 = 0 + 4

Combine like terms: 0 + 4 = 4
81b2 = 4

Divide each side by '81'.
b2 = 0.04938271605

Simplifying
b2 = 0.04938271605

Take the square root of each side:
b = {-0.222222222, 0.222222222}