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Simplifying 3(x + -4)(4x + 7) = 0 Reorder the terms: 3(-4 + x)(4x + 7) = 0 Reorder the terms: 3(-4 + x)(7 + 4x) = 0 Multiply (-4 + x) * (7 + 4x) 3(-4(7 + 4x) + x(7 + 4x)) = 0 3((7 * -4 + 4x * -4) + x(7 + 4x)) = 0 3((-28 + -16x) + x(7 + 4x)) = 0 3(-28 + -16x + (7 * x + 4x * x)) = 0 3(-28 + -16x + (7x + 4x2)) = 0 Combine like terms: -16x + 7x = -9x 3(-28 + -9x + 4x2) = 0 (-28 * 3 + -9x * 3 + 4x2 * 3) = 0 (-84 + -27x + 12x2) = 0 Solving -84 + -27x + 12x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(-28 + -9x + 4x2) = 0 Factor a trinomial. 3((-7 + -4x)(4 + -1x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-7 + -4x)' equal to zero and attempt to solve: Simplifying -7 + -4x = 0 Solving -7 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -4x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -4x = 0 + 7 -4x = 0 + 7 Combine like terms: 0 + 7 = 7 -4x = 7 Divide each side by '-4'. x = -1.75 Simplifying x = -1.75Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 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 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4Solution
x = {-1.75, 4}
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