c^2+7c=18

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Solution for c^2+7c=18 equation:


Simplifying
c2 + 7c = 18

Reorder the terms:
7c + c2 = 18

Solving
7c + c2 = 18

Solving for variable 'c'.

Reorder the terms:
-18 + 7c + c2 = 18 + -18

Combine like terms: 18 + -18 = 0
-18 + 7c + c2 = 0

Factor a trinomial.
(-9 + -1c)(2 + -1c) = 0

Subproblem 1

Set the factor '(-9 + -1c)' equal to zero and attempt to solve: Simplifying -9 + -1c = 0 Solving -9 + -1c = 0 Move all terms containing c to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1c = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1c = 0 + 9 -1c = 0 + 9 Combine like terms: 0 + 9 = 9 -1c = 9 Divide each side by '-1'. c = -9 Simplifying c = -9

Subproblem 2

Set the factor '(2 + -1c)' equal to zero and attempt to solve: Simplifying 2 + -1c = 0 Solving 2 + -1c = 0 Move all terms containing c to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1c = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1c = 0 + -2 -1c = 0 + -2 Combine like terms: 0 + -2 = -2 -1c = -2 Divide each side by '-1'. c = 2 Simplifying c = 2

Solution

c = {-9, 2}

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