(15+3b)(15+5b)=

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Solution for (15+3b)(15+5b)= equation:


Simplifying
(15 + 3b)(15 + 5b) = 0

Multiply (15 + 3b) * (15 + 5b)
(15(15 + 5b) + 3b * (15 + 5b)) = 0
((15 * 15 + 5b * 15) + 3b * (15 + 5b)) = 0
((225 + 75b) + 3b * (15 + 5b)) = 0
(225 + 75b + (15 * 3b + 5b * 3b)) = 0
(225 + 75b + (45b + 15b2)) = 0

Combine like terms: 75b + 45b = 120b
(225 + 120b + 15b2) = 0

Solving
225 + 120b + 15b2 = 0

Solving for variable 'b'.

Factor out the Greatest Common Factor (GCF), '15'.
15(15 + 8b + b2) = 0

Factor a trinomial.
15((5 + b)(3 + b)) = 0

Ignore the factor 15.

Subproblem 1

Set the factor '(5 + b)' equal to zero and attempt to solve: Simplifying 5 + b = 0 Solving 5 + b = 0 Move all terms containing b to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + b = 0 + -5 Combine like terms: 5 + -5 = 0 0 + b = 0 + -5 b = 0 + -5 Combine like terms: 0 + -5 = -5 b = -5 Simplifying b = -5

Subproblem 2

Set the factor '(3 + b)' equal to zero and attempt to solve: Simplifying 3 + b = 0 Solving 3 + b = 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 + b = 0 + -3 Combine like terms: 3 + -3 = 0 0 + b = 0 + -3 b = 0 + -3 Combine like terms: 0 + -3 = -3 b = -3 Simplifying b = -3

Solution

b = {-5, -3}

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