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Simplifying 5x(3x + -14) = x2 + -56 Reorder the terms: 5x(-14 + 3x) = x2 + -56 (-14 * 5x + 3x * 5x) = x2 + -56 (-70x + 15x2) = x2 + -56 Reorder the terms: -70x + 15x2 = -56 + x2 Solving -70x + 15x2 = -56 + x2 Solving for variable 'x'. Reorder the terms: 56 + -70x + 15x2 + -1x2 = -56 + x2 + 56 + -1x2 Combine like terms: 15x2 + -1x2 = 14x2 56 + -70x + 14x2 = -56 + x2 + 56 + -1x2 Reorder the terms: 56 + -70x + 14x2 = -56 + 56 + x2 + -1x2 Combine like terms: -56 + 56 = 0 56 + -70x + 14x2 = 0 + x2 + -1x2 56 + -70x + 14x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 56 + -70x + 14x2 = 0 Factor out the Greatest Common Factor (GCF), '14'. 14(4 + -5x + x2) = 0 Factor a trinomial. 14((1 + -1x)(4 + -1x)) = 0 Ignore the factor 14.Subproblem 1
Set the factor '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1Subproblem 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, 4}
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