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Simplifying (d + 2)(d + -5) = 0 Reorder the terms: (2 + d)(d + -5) = 0 Reorder the terms: (2 + d)(-5 + d) = 0 Multiply (2 + d) * (-5 + d) (2(-5 + d) + d(-5 + d)) = 0 ((-5 * 2 + d * 2) + d(-5 + d)) = 0 ((-10 + 2d) + d(-5 + d)) = 0 (-10 + 2d + (-5 * d + d * d)) = 0 (-10 + 2d + (-5d + d2)) = 0 Combine like terms: 2d + -5d = -3d (-10 + -3d + d2) = 0 Solving -10 + -3d + d2 = 0 Solving for variable 'd'. Factor a trinomial. (-2 + -1d)(5 + -1d) = 0Subproblem 1
Set the factor '(-2 + -1d)' equal to zero and attempt to solve: Simplifying -2 + -1d = 0 Solving -2 + -1d = 0 Move all terms containing d to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1d = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1d = 0 + 2 -1d = 0 + 2 Combine like terms: 0 + 2 = 2 -1d = 2 Divide each side by '-1'. d = -2 Simplifying d = -2Subproblem 2
Set the factor '(5 + -1d)' equal to zero and attempt to solve: Simplifying 5 + -1d = 0 Solving 5 + -1d = 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 + -1d = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1d = 0 + -5 -1d = 0 + -5 Combine like terms: 0 + -5 = -5 -1d = -5 Divide each side by '-1'. d = 5 Simplifying d = 5Solution
d = {-2, 5}
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