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Simplifying (b + 4)(3b + 7) = 0 Reorder the terms: (4 + b)(3b + 7) = 0 Reorder the terms: (4 + b)(7 + 3b) = 0 Multiply (4 + b) * (7 + 3b) (4(7 + 3b) + b(7 + 3b)) = 0 ((7 * 4 + 3b * 4) + b(7 + 3b)) = 0 ((28 + 12b) + b(7 + 3b)) = 0 (28 + 12b + (7 * b + 3b * b)) = 0 (28 + 12b + (7b + 3b2)) = 0 Combine like terms: 12b + 7b = 19b (28 + 19b + 3b2) = 0 Solving 28 + 19b + 3b2 = 0 Solving for variable 'b'. Factor a trinomial. (4 + b)(7 + 3b) = 0Subproblem 1
Set the factor '(4 + b)' equal to zero and attempt to solve: Simplifying 4 + b = 0 Solving 4 + b = 0 Move all terms containing b to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + b = 0 + -4 Combine like terms: 4 + -4 = 0 0 + b = 0 + -4 b = 0 + -4 Combine like terms: 0 + -4 = -4 b = -4 Simplifying b = -4Subproblem 2
Set the factor '(7 + 3b)' equal to zero and attempt to solve: Simplifying 7 + 3b = 0 Solving 7 + 3b = 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 + 3b = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 3b = 0 + -7 3b = 0 + -7 Combine like terms: 0 + -7 = -7 3b = -7 Divide each side by '3'. b = -2.333333333 Simplifying b = -2.333333333Solution
b = {-4, -2.333333333}
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