2d^2-14d-240=0

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Solution for 2d^2-14d-240=0 equation:


Simplifying
2d2 + -14d + -240 = 0

Reorder the terms:
-240 + -14d + 2d2 = 0

Solving
-240 + -14d + 2d2 = 0

Solving for variable 'd'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-120 + -7d + d2) = 0

Factor a trinomial.
2((-8 + -1d)(15 + -1d)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-8 + -1d)' equal to zero and attempt to solve: Simplifying -8 + -1d = 0 Solving -8 + -1d = 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 + -1d = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1d = 0 + 8 -1d = 0 + 8 Combine like terms: 0 + 8 = 8 -1d = 8 Divide each side by '-1'. d = -8 Simplifying d = -8

Subproblem 2

Set the factor '(15 + -1d)' equal to zero and attempt to solve: Simplifying 15 + -1d = 0 Solving 15 + -1d = 0 Move all terms containing d to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1d = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1d = 0 + -15 -1d = 0 + -15 Combine like terms: 0 + -15 = -15 -1d = -15 Divide each side by '-1'. d = 15 Simplifying d = 15

Solution

d = {-8, 15}

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