(5b-3)(7b+3)=

Solution for (5b-3)(7b+3)= equation:

Simplifying
(5b + -3)(7b + 3) = 0

Reorder the terms:
(-3 + 5b)(7b + 3) = 0

Reorder the terms:
(-3 + 5b)(3 + 7b) = 0

Multiply (-3 + 5b) * (3 + 7b)
(-3(3 + 7b) + 5b * (3 + 7b)) = 0
((3 * -3 + 7b * -3) + 5b * (3 + 7b)) = 0
((-9 + -21b) + 5b * (3 + 7b)) = 0
(-9 + -21b + (3 * 5b + 7b * 5b)) = 0
(-9 + -21b + (15b + 35b2)) = 0

Combine like terms: -21b + 15b = -6b
(-9 + -6b + 35b2) = 0

Solving
-9 + -6b + 35b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-3 + -7b)(3 + -5b) = 0

Subproblem 1
Set the factor '(-3 + -7b)' equal to zero and attempt to solve:

Simplifying
-3 + -7b = 0

Solving
-3 + -7b = 0

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

Add '3' to each side of the equation.
-3 + 3 + -7b = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -7b = 0 + 3
-7b = 0 + 3

Combine like terms: 0 + 3 = 3
-7b = 3

Divide each side by '-7'.
b = -0.4285714286

Simplifying
b = -0.4285714286
Subproblem 2
Set the factor '(3 + -5b)' equal to zero and attempt to solve:

Simplifying
3 + -5b = 0

Solving
3 + -5b = 0

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

Add '-3' to each side of the equation.
3 + -3 + -5b = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -5b = 0 + -3
-5b = 0 + -3

Combine like terms: 0 + -3 = -3
-5b = -3

Divide each side by '-5'.
b = 0.6

Simplifying
b = 0.6
Solution
b = {-0.4285714286, 0.6}