(5n^2)-25n-120=0

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Solution for (5n^2)-25n-120=0 equation:


Simplifying
(5n2) + -25n + -120 = 0

Reorder the terms:
-120 + -25n + (5n2) = 0

Solving
-120 + -25n + (5n2) = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-24 + -5n + n2) = 0

Factor a trinomial.
5((-3 + -1n)(8 + -1n)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-3 + -1n)' equal to zero and attempt to solve: Simplifying -3 + -1n = 0 Solving -3 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1n = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1n = 0 + 3 -1n = 0 + 3 Combine like terms: 0 + 3 = 3 -1n = 3 Divide each side by '-1'. n = -3 Simplifying n = -3

Subproblem 2

Set the factor '(8 + -1n)' equal to zero and attempt to solve: Simplifying 8 + -1n = 0 Solving 8 + -1n = 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 + -1n = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1n = 0 + -8 -1n = 0 + -8 Combine like terms: 0 + -8 = -8 -1n = -8 Divide each side by '-1'. n = 8 Simplifying n = 8

Solution

n = {-3, 8}

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