n^2-13n=-40

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Solution for n^2-13n=-40 equation:


Simplifying
n2 + -13n = -40

Reorder the terms:
-13n + n2 = -40

Solving
-13n + n2 = -40

Solving for variable 'n'.

Reorder the terms:
40 + -13n + n2 = -40 + 40

Combine like terms: -40 + 40 = 0
40 + -13n + n2 = 0

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

Subproblem 1

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

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 = {5, 8}

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