21k^2+91k+98=0

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Solution for 21k^2+91k+98=0 equation:


Simplifying
21k2 + 91k + 98 = 0

Reorder the terms:
98 + 91k + 21k2 = 0

Solving
98 + 91k + 21k2 = 0

Solving for variable 'k'.

Factor out the Greatest Common Factor (GCF), '7'.
7(14 + 13k + 3k2) = 0

Factor a trinomial.
7((7 + 3k)(2 + k)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(7 + 3k)' equal to zero and attempt to solve: Simplifying 7 + 3k = 0 Solving 7 + 3k = 0 Move all terms containing k to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 3k = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 3k = 0 + -7 3k = 0 + -7 Combine like terms: 0 + -7 = -7 3k = -7 Divide each side by '3'. k = -2.333333333 Simplifying k = -2.333333333

Subproblem 2

Set the factor '(2 + k)' equal to zero and attempt to solve: Simplifying 2 + k = 0 Solving 2 + k = 0 Move all terms containing k to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + k = 0 + -2 Combine like terms: 2 + -2 = 0 0 + k = 0 + -2 k = 0 + -2 Combine like terms: 0 + -2 = -2 k = -2 Simplifying k = -2

Solution

k = {-2.333333333, -2}

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