15k^2-40k=80

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Solution for 15k^2-40k=80 equation:


Simplifying
15k2 + -40k = 80

Reorder the terms:
-40k + 15k2 = 80

Solving
-40k + 15k2 = 80

Solving for variable 'k'.

Reorder the terms:
-80 + -40k + 15k2 = 80 + -80

Combine like terms: 80 + -80 = 0
-80 + -40k + 15k2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-16 + -8k + 3k2) = 0

Factor a trinomial.
5((-4 + -3k)(4 + -1k)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-4 + -3k)' equal to zero and attempt to solve: Simplifying -4 + -3k = 0 Solving -4 + -3k = 0 Move all terms containing k to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -3k = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -3k = 0 + 4 -3k = 0 + 4 Combine like terms: 0 + 4 = 4 -3k = 4 Divide each side by '-3'. k = -1.333333333 Simplifying k = -1.333333333

Subproblem 2

Set the factor '(4 + -1k)' equal to zero and attempt to solve: Simplifying 4 + -1k = 0 Solving 4 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1k = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1k = 0 + -4 -1k = 0 + -4 Combine like terms: 0 + -4 = -4 -1k = -4 Divide each side by '-1'. k = 4 Simplifying k = 4

Solution

k = {-1.333333333, 4}

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