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Simplifying 4x(x + -2) + 7(x + -2) = 0 Reorder the terms: 4x(-2 + x) + 7(x + -2) = 0 (-2 * 4x + x * 4x) + 7(x + -2) = 0 (-8x + 4x2) + 7(x + -2) = 0 Reorder the terms: -8x + 4x2 + 7(-2 + x) = 0 -8x + 4x2 + (-2 * 7 + x * 7) = 0 -8x + 4x2 + (-14 + 7x) = 0 Reorder the terms: -14 + -8x + 7x + 4x2 = 0 Combine like terms: -8x + 7x = -1x -14 + -1x + 4x2 = 0 Solving -14 + -1x + 4x2 = 0 Solving for variable 'x'. Factor a trinomial. (-7 + -4x)(2 + -1x) = 0Subproblem 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 '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2Solution
x = {-1.75, 2}
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