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Simplifying (3x + 4)(x + 5) = 3(x + 2) + -2 Reorder the terms: (4 + 3x)(x + 5) = 3(x + 2) + -2 Reorder the terms: (4 + 3x)(5 + x) = 3(x + 2) + -2 Multiply (4 + 3x) * (5 + x) (4(5 + x) + 3x * (5 + x)) = 3(x + 2) + -2 ((5 * 4 + x * 4) + 3x * (5 + x)) = 3(x + 2) + -2 ((20 + 4x) + 3x * (5 + x)) = 3(x + 2) + -2 (20 + 4x + (5 * 3x + x * 3x)) = 3(x + 2) + -2 (20 + 4x + (15x + 3x2)) = 3(x + 2) + -2 Combine like terms: 4x + 15x = 19x (20 + 19x + 3x2) = 3(x + 2) + -2 Reorder the terms: 20 + 19x + 3x2 = 3(2 + x) + -2 20 + 19x + 3x2 = (2 * 3 + x * 3) + -2 20 + 19x + 3x2 = (6 + 3x) + -2 Reorder the terms: 20 + 19x + 3x2 = 6 + -2 + 3x Combine like terms: 6 + -2 = 4 20 + 19x + 3x2 = 4 + 3x Solving 20 + 19x + 3x2 = 4 + 3x Solving for variable 'x'. Reorder the terms: 20 + -4 + 19x + -3x + 3x2 = 4 + 3x + -4 + -3x Combine like terms: 20 + -4 = 16 16 + 19x + -3x + 3x2 = 4 + 3x + -4 + -3x Combine like terms: 19x + -3x = 16x 16 + 16x + 3x2 = 4 + 3x + -4 + -3x Reorder the terms: 16 + 16x + 3x2 = 4 + -4 + 3x + -3x Combine like terms: 4 + -4 = 0 16 + 16x + 3x2 = 0 + 3x + -3x 16 + 16x + 3x2 = 3x + -3x Combine like terms: 3x + -3x = 0 16 + 16x + 3x2 = 0 Factor a trinomial. (4 + x)(4 + 3x) = 0Subproblem 1
Set the factor '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4Subproblem 2
Set the factor '(4 + 3x)' equal to zero and attempt to solve: Simplifying 4 + 3x = 0 Solving 4 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 3x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 3x = 0 + -4 3x = 0 + -4 Combine like terms: 0 + -4 = -4 3x = -4 Divide each side by '3'. x = -1.333333333 Simplifying x = -1.333333333Solution
x = {-4, -1.333333333}
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