c^2=-20-9c

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Solution for c^2=-20-9c equation:


Simplifying
c2 = -20 + -9c

Solving
c2 = -20 + -9c

Solving for variable 'c'.

Reorder the terms:
20 + 9c + c2 = -20 + -9c + 20 + 9c

Reorder the terms:
20 + 9c + c2 = -20 + 20 + -9c + 9c

Combine like terms: -20 + 20 = 0
20 + 9c + c2 = 0 + -9c + 9c
20 + 9c + c2 = -9c + 9c

Combine like terms: -9c + 9c = 0
20 + 9c + c2 = 0

Factor a trinomial.
(5 + c)(4 + c) = 0

Subproblem 1

Set the factor '(5 + c)' equal to zero and attempt to solve: Simplifying 5 + c = 0 Solving 5 + c = 0 Move all terms containing c to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + c = 0 + -5 Combine like terms: 5 + -5 = 0 0 + c = 0 + -5 c = 0 + -5 Combine like terms: 0 + -5 = -5 c = -5 Simplifying c = -5

Subproblem 2

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

Solution

c = {-5, -4}

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