40d^2+39d-40=

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Solution for 40d^2+39d-40= equation:


Simplifying
40d2 + 39d + -40 = 0

Reorder the terms:
-40 + 39d + 40d2 = 0

Solving
-40 + 39d + 40d2 = 0

Solving for variable 'd'.

Factor a trinomial.
(-8 + -5d)(5 + -8d) = 0

Subproblem 1

Set the factor '(-8 + -5d)' equal to zero and attempt to solve: Simplifying -8 + -5d = 0 Solving -8 + -5d = 0 Move all terms containing d to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -5d = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -5d = 0 + 8 -5d = 0 + 8 Combine like terms: 0 + 8 = 8 -5d = 8 Divide each side by '-5'. d = -1.6 Simplifying d = -1.6

Subproblem 2

Set the factor '(5 + -8d)' equal to zero and attempt to solve: Simplifying 5 + -8d = 0 Solving 5 + -8d = 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 + -8d = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -8d = 0 + -5 -8d = 0 + -5 Combine like terms: 0 + -5 = -5 -8d = -5 Divide each side by '-8'. d = 0.625 Simplifying d = 0.625

Solution

d = {-1.6, 0.625}

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