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Simplifying 3n2 = -120 + -39n Solving 3n2 = -120 + -39n Solving for variable 'n'. Reorder the terms: 120 + 39n + 3n2 = -120 + -39n + 120 + 39n Reorder the terms: 120 + 39n + 3n2 = -120 + 120 + -39n + 39n Combine like terms: -120 + 120 = 0 120 + 39n + 3n2 = 0 + -39n + 39n 120 + 39n + 3n2 = -39n + 39n Combine like terms: -39n + 39n = 0 120 + 39n + 3n2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(40 + 13n + n2) = 0 Factor a trinomial. 3((8 + n)(5 + n)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(8 + n)' equal to zero and attempt to solve: Simplifying 8 + n = 0 Solving 8 + n = 0 Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + n = 0 + -8 Combine like terms: 8 + -8 = 0 0 + n = 0 + -8 n = 0 + -8 Combine like terms: 0 + -8 = -8 n = -8 Simplifying n = -8Subproblem 2
Set the factor '(5 + n)' equal to zero and attempt to solve: Simplifying 5 + n = 0 Solving 5 + n = 0 Move all terms containing n to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + n = 0 + -5 Combine like terms: 5 + -5 = 0 0 + n = 0 + -5 n = 0 + -5 Combine like terms: 0 + -5 = -5 n = -5 Simplifying n = -5Solution
n = {-8, -5}
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