(b+5)(2b-7)=

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Solution for (b+5)(2b-7)= equation:


Simplifying
(b + 5)(2b + -7) = 0

Reorder the terms:
(5 + b)(2b + -7) = 0

Reorder the terms:
(5 + b)(-7 + 2b) = 0

Multiply (5 + b) * (-7 + 2b)
(5(-7 + 2b) + b(-7 + 2b)) = 0
((-7 * 5 + 2b * 5) + b(-7 + 2b)) = 0
((-35 + 10b) + b(-7 + 2b)) = 0
(-35 + 10b + (-7 * b + 2b * b)) = 0
(-35 + 10b + (-7b + 2b2)) = 0

Combine like terms: 10b + -7b = 3b
(-35 + 3b + 2b2) = 0

Solving
-35 + 3b + 2b2 = 0

Solving for variable 'b'.

Factor a trinomial.
(-5 + -1b)(7 + -2b) = 0

Subproblem 1

Set the factor '(-5 + -1b)' equal to zero and attempt to solve: Simplifying -5 + -1b = 0 Solving -5 + -1b = 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 + -1b = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1b = 0 + 5 -1b = 0 + 5 Combine like terms: 0 + 5 = 5 -1b = 5 Divide each side by '-1'. b = -5 Simplifying b = -5

Subproblem 2

Set the factor '(7 + -2b)' equal to zero and attempt to solve: Simplifying 7 + -2b = 0 Solving 7 + -2b = 0 Move all terms containing b to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2b = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2b = 0 + -7 -2b = 0 + -7 Combine like terms: 0 + -7 = -7 -2b = -7 Divide each side by '-2'. b = 3.5 Simplifying b = 3.5

Solution

b = {-5, 3.5}

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