(3b+13)(5b-6)=

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Solution for (3b+13)(5b-6)= equation:


Simplifying
(3b + 13)(5b + -6) = 0

Reorder the terms:
(13 + 3b)(5b + -6) = 0

Reorder the terms:
(13 + 3b)(-6 + 5b) = 0

Multiply (13 + 3b) * (-6 + 5b)
(13(-6 + 5b) + 3b * (-6 + 5b)) = 0
((-6 * 13 + 5b * 13) + 3b * (-6 + 5b)) = 0
((-78 + 65b) + 3b * (-6 + 5b)) = 0
(-78 + 65b + (-6 * 3b + 5b * 3b)) = 0
(-78 + 65b + (-18b + 15b2)) = 0

Combine like terms: 65b + -18b = 47b
(-78 + 47b + 15b2) = 0

Solving
-78 + 47b + 15b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-13 + -3b)(6 + -5b) = 0

Subproblem 1

Set the factor '(-13 + -3b)' equal to zero and attempt to solve: Simplifying -13 + -3b = 0 Solving -13 + -3b = 0 Move all terms containing b to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + -3b = 0 + 13 Combine like terms: -13 + 13 = 0 0 + -3b = 0 + 13 -3b = 0 + 13 Combine like terms: 0 + 13 = 13 -3b = 13 Divide each side by '-3'. b = -4.333333333 Simplifying b = -4.333333333

Subproblem 2

Set the factor '(6 + -5b)' equal to zero and attempt to solve: Simplifying 6 + -5b = 0 Solving 6 + -5b = 0 Move all terms containing b to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -5b = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -5b = 0 + -6 -5b = 0 + -6 Combine like terms: 0 + -6 = -6 -5b = -6 Divide each side by '-5'. b = 1.2 Simplifying b = 1.2

Solution

b = {-4.333333333, 1.2}

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