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Simplifying 3x(x + -5) + 7(x + -5) = 0 Reorder the terms: 3x(-5 + x) + 7(x + -5) = 0 (-5 * 3x + x * 3x) + 7(x + -5) = 0 (-15x + 3x2) + 7(x + -5) = 0 Reorder the terms: -15x + 3x2 + 7(-5 + x) = 0 -15x + 3x2 + (-5 * 7 + x * 7) = 0 -15x + 3x2 + (-35 + 7x) = 0 Reorder the terms: -35 + -15x + 7x + 3x2 = 0 Combine like terms: -15x + 7x = -8x -35 + -8x + 3x2 = 0 Solving -35 + -8x + 3x2 = 0 Solving for variable 'x'. Factor a trinomial. (-7 + -3x)(5 + -1x) = 0Subproblem 1
Set the factor '(-7 + -3x)' equal to zero and attempt to solve: Simplifying -7 + -3x = 0 Solving -7 + -3x = 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 + -3x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -3x = 0 + 7 -3x = 0 + 7 Combine like terms: 0 + 7 = 7 -3x = 7 Divide each side by '-3'. x = -2.333333333 Simplifying x = -2.333333333Subproblem 2
Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5Solution
x = {-2.333333333, 5}
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