7k^2-66k+80=0

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Solution for 7k^2-66k+80=0 equation:


Simplifying
7k2 + -66k + 80 = 0

Reorder the terms:
80 + -66k + 7k2 = 0

Solving
80 + -66k + 7k2 = 0

Solving for variable 'k'.

Factor a trinomial.
(10 + -7k)(8 + -1k) = 0

Subproblem 1

Set the factor '(10 + -7k)' equal to zero and attempt to solve: Simplifying 10 + -7k = 0 Solving 10 + -7k = 0 Move all terms containing k to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -7k = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -7k = 0 + -10 -7k = 0 + -10 Combine like terms: 0 + -10 = -10 -7k = -10 Divide each side by '-7'. k = 1.428571429 Simplifying k = 1.428571429

Subproblem 2

Set the factor '(8 + -1k)' equal to zero and attempt to solve: Simplifying 8 + -1k = 0 Solving 8 + -1k = 0 Move all terms containing k to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1k = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1k = 0 + -8 -1k = 0 + -8 Combine like terms: 0 + -8 = -8 -1k = -8 Divide each side by '-1'. k = 8 Simplifying k = 8

Solution

k = {1.428571429, 8}

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