(3b+4)(3b-4)=

Solution for (3b+4)(3b-4)= equation:

Simplifying
(3b + 4)(3b + -4) = 0

Reorder the terms:
(4 + 3b)(3b + -4) = 0

Reorder the terms:
(4 + 3b)(-4 + 3b) = 0

Multiply (4 + 3b) * (-4 + 3b)
(4(-4 + 3b) + 3b * (-4 + 3b)) = 0
((-4 * 4 + 3b * 4) + 3b * (-4 + 3b)) = 0
((-16 + 12b) + 3b * (-4 + 3b)) = 0
(-16 + 12b + (-4 * 3b + 3b * 3b)) = 0
(-16 + 12b + (-12b + 9b2)) = 0

Combine like terms: 12b + -12b = 0
(-16 + 0 + 9b2) = 0
(-16 + 9b2) = 0

Solving
-16 + 9b2 = 0

Solving for variable 'b'.

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

Add '16' to each side of the equation.
-16 + 16 + 9b2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 9b2 = 0 + 16
9b2 = 0 + 16

Combine like terms: 0 + 16 = 16
9b2 = 16

Divide each side by '9'.
b2 = 1.777777778

Simplifying
b2 = 1.777777778

Take the square root of each side:
b = {-1.333333333, 1.333333333}