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Simplifying 4c(5c + 4) + 5(5c + 4) = 0 Reorder the terms: 4c(4 + 5c) + 5(5c + 4) = 0 (4 * 4c + 5c * 4c) + 5(5c + 4) = 0 (16c + 20c2) + 5(5c + 4) = 0 Reorder the terms: 16c + 20c2 + 5(4 + 5c) = 0 16c + 20c2 + (4 * 5 + 5c * 5) = 0 16c + 20c2 + (20 + 25c) = 0 Reorder the terms: 20 + 16c + 25c + 20c2 = 0 Combine like terms: 16c + 25c = 41c 20 + 41c + 20c2 = 0 Solving 20 + 41c + 20c2 = 0 Solving for variable 'c'. Factor a trinomial. (5 + 4c)(4 + 5c) = 0Subproblem 1
Set the factor '(5 + 4c)' equal to zero and attempt to solve: Simplifying 5 + 4c = 0 Solving 5 + 4c = 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 + 4c = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4c = 0 + -5 4c = 0 + -5 Combine like terms: 0 + -5 = -5 4c = -5 Divide each side by '4'. c = -1.25 Simplifying c = -1.25Subproblem 2
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 = -0.8Solution
c = {-1.25, -0.8}
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