c(c-4)=45

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Solution for c(c-4)=45 equation:


Simplifying
c(c + -4) = 45

Reorder the terms:
c(-4 + c) = 45
(-4 * c + c * c) = 45
(-4c + c2) = 45

Solving
-4c + c2 = 45

Solving for variable 'c'.

Reorder the terms:
-45 + -4c + c2 = 45 + -45

Combine like terms: 45 + -45 = 0
-45 + -4c + c2 = 0

Factor a trinomial.
(-5 + -1c)(9 + -1c) = 0

Subproblem 1

Set the factor '(-5 + -1c)' equal to zero and attempt to solve: Simplifying -5 + -1c = 0 Solving -5 + -1c = 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 + -1c = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1c = 0 + 5 -1c = 0 + 5 Combine like terms: 0 + 5 = 5 -1c = 5 Divide each side by '-1'. c = -5 Simplifying c = -5

Subproblem 2

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

Solution

c = {-5, 9}

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