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Simplifying 12d2 + -1d + -20 = 0 Reorder the terms: -20 + -1d + 12d2 = 0 Solving -20 + -1d + 12d2 = 0 Solving for variable 'd'. Factor a trinomial. (-5 + -4d)(4 + -3d) = 0Subproblem 1
Set the factor '(-5 + -4d)' equal to zero and attempt to solve: Simplifying -5 + -4d = 0 Solving -5 + -4d = 0 Move all terms containing d to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -4d = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -4d = 0 + 5 -4d = 0 + 5 Combine like terms: 0 + 5 = 5 -4d = 5 Divide each side by '-4'. d = -1.25 Simplifying d = -1.25Subproblem 2
Set the factor '(4 + -3d)' equal to zero and attempt to solve: Simplifying 4 + -3d = 0 Solving 4 + -3d = 0 Move all terms containing d to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -3d = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -3d = 0 + -4 -3d = 0 + -4 Combine like terms: 0 + -4 = -4 -3d = -4 Divide each side by '-3'. d = 1.333333333 Simplifying d = 1.333333333Solution
d = {-1.25, 1.333333333}
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