(10b+7)(3b-9)=0

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Solution for (10b+7)(3b-9)=0 equation:


Simplifying
(10b + 7)(3b + -9) = 0

Reorder the terms:
(7 + 10b)(3b + -9) = 0

Reorder the terms:
(7 + 10b)(-9 + 3b) = 0

Multiply (7 + 10b) * (-9 + 3b)
(7(-9 + 3b) + 10b * (-9 + 3b)) = 0
((-9 * 7 + 3b * 7) + 10b * (-9 + 3b)) = 0
((-63 + 21b) + 10b * (-9 + 3b)) = 0
(-63 + 21b + (-9 * 10b + 3b * 10b)) = 0
(-63 + 21b + (-90b + 30b2)) = 0

Combine like terms: 21b + -90b = -69b
(-63 + -69b + 30b2) = 0

Solving
-63 + -69b + 30b2 = 0

Solving for variable 'b'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-21 + -23b + 10b2) = 0

Factor a trinomial.
3((-7 + -10b)(3 + -1b)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-7 + -10b)' equal to zero and attempt to solve: Simplifying -7 + -10b = 0 Solving -7 + -10b = 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 + -10b = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -10b = 0 + 7 -10b = 0 + 7 Combine like terms: 0 + 7 = 7 -10b = 7 Divide each side by '-10'. b = -0.7 Simplifying b = -0.7

Subproblem 2

Set the factor '(3 + -1b)' equal to zero and attempt to solve: Simplifying 3 + -1b = 0 Solving 3 + -1b = 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 + -1b = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1b = 0 + -3 -1b = 0 + -3 Combine like terms: 0 + -3 = -3 -1b = -3 Divide each side by '-1'. b = 3 Simplifying b = 3

Solution

b = {-0.7, 3}

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