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Simplifying 5x2 + 8x + -15 = 21 + -16x Reorder the terms: -15 + 8x + 5x2 = 21 + -16x Solving -15 + 8x + 5x2 = 21 + -16x Solving for variable 'x'. Reorder the terms: -15 + -21 + 8x + 16x + 5x2 = 21 + -16x + -21 + 16x Combine like terms: -15 + -21 = -36 -36 + 8x + 16x + 5x2 = 21 + -16x + -21 + 16x Combine like terms: 8x + 16x = 24x -36 + 24x + 5x2 = 21 + -16x + -21 + 16x Reorder the terms: -36 + 24x + 5x2 = 21 + -21 + -16x + 16x Combine like terms: 21 + -21 = 0 -36 + 24x + 5x2 = 0 + -16x + 16x -36 + 24x + 5x2 = -16x + 16x Combine like terms: -16x + 16x = 0 -36 + 24x + 5x2 = 0 Factor a trinomial. (-6 + -1x)(6 + -5x) = 0Subproblem 1
Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6Subproblem 2
Set the factor '(6 + -5x)' equal to zero and attempt to solve: Simplifying 6 + -5x = 0 Solving 6 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -5x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -5x = 0 + -6 -5x = 0 + -6 Combine like terms: 0 + -6 = -6 -5x = -6 Divide each side by '-5'. x = 1.2 Simplifying x = 1.2Solution
x = {-6, 1.2}
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