k^2+11k=-28

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Solution for k^2+11k=-28 equation:


Simplifying
k2 + 11k = -28

Reorder the terms:
11k + k2 = -28

Solving
11k + k2 = -28

Solving for variable 'k'.

Reorder the terms:
28 + 11k + k2 = -28 + 28

Combine like terms: -28 + 28 = 0
28 + 11k + k2 = 0

Factor a trinomial.
(7 + k)(4 + k) = 0

Subproblem 1

Set the factor '(7 + k)' equal to zero and attempt to solve: Simplifying 7 + k = 0 Solving 7 + k = 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 + k = 0 + -7 Combine like terms: 7 + -7 = 0 0 + k = 0 + -7 k = 0 + -7 Combine like terms: 0 + -7 = -7 k = -7 Simplifying k = -7

Subproblem 2

Set the factor '(4 + k)' equal to zero and attempt to solve: Simplifying 4 + k = 0 Solving 4 + k = 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 + k = 0 + -4 Combine like terms: 4 + -4 = 0 0 + k = 0 + -4 k = 0 + -4 Combine like terms: 0 + -4 = -4 k = -4 Simplifying k = -4

Solution

k = {-7, -4}

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