(5c+4)(c-4)=

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Solution for (5c+4)(c-4)= equation:


Simplifying
(5c + 4)(c + -4) = 0

Reorder the terms:
(4 + 5c)(c + -4) = 0

Reorder the terms:
(4 + 5c)(-4 + c) = 0

Multiply (4 + 5c) * (-4 + c)
(4(-4 + c) + 5c * (-4 + c)) = 0
((-4 * 4 + c * 4) + 5c * (-4 + c)) = 0
((-16 + 4c) + 5c * (-4 + c)) = 0
(-16 + 4c + (-4 * 5c + c * 5c)) = 0
(-16 + 4c + (-20c + 5c2)) = 0

Combine like terms: 4c + -20c = -16c
(-16 + -16c + 5c2) = 0

Solving
-16 + -16c + 5c2 = 0

Solving for variable 'c'.

Factor a trinomial.
(-4 + -5c)(4 + -1c) = 0

Subproblem 1

Set the factor '(-4 + -5c)' equal to zero and attempt to solve: Simplifying -4 + -5c = 0 Solving -4 + -5c = 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 + -5c = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5c = 0 + 4 -5c = 0 + 4 Combine like terms: 0 + 4 = 4 -5c = 4 Divide each side by '-5'. c = -0.8 Simplifying c = -0.8

Subproblem 2

Set the factor '(4 + -1c)' equal to zero and attempt to solve: Simplifying 4 + -1c = 0 Solving 4 + -1c = 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 + -1c = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1c = 0 + -4 -1c = 0 + -4 Combine like terms: 0 + -4 = -4 -1c = -4 Divide each side by '-1'. c = 4 Simplifying c = 4

Solution

c = {-0.8, 4}

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