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Simplifying (x + -7)(5x + 4) = 0 Reorder the terms: (-7 + x)(5x + 4) = 0 Reorder the terms: (-7 + x)(4 + 5x) = 0 Multiply (-7 + x) * (4 + 5x) (-7(4 + 5x) + x(4 + 5x)) = 0 ((4 * -7 + 5x * -7) + x(4 + 5x)) = 0 ((-28 + -35x) + x(4 + 5x)) = 0 (-28 + -35x + (4 * x + 5x * x)) = 0 (-28 + -35x + (4x + 5x2)) = 0 Combine like terms: -35x + 4x = -31x (-28 + -31x + 5x2) = 0 Solving -28 + -31x + 5x2 = 0 Solving for variable 'x'. Factor a trinomial. (-4 + -5x)(7 + -1x) = 0Subproblem 1
Set the factor '(-4 + -5x)' equal to zero and attempt to solve: Simplifying -4 + -5x = 0 Solving -4 + -5x = 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 + -5x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5x = 0 + 4 -5x = 0 + 4 Combine like terms: 0 + 4 = 4 -5x = 4 Divide each side by '-5'. x = -0.8 Simplifying x = -0.8Subproblem 2
Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 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 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7Solution
x = {-0.8, 7}
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