n^2-20n=-75

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Solution for n^2-20n=-75 equation:


Simplifying
n2 + -20n = -75

Reorder the terms:
-20n + n2 = -75

Solving
-20n + n2 = -75

Solving for variable 'n'.

Reorder the terms:
75 + -20n + n2 = -75 + 75

Combine like terms: -75 + 75 = 0
75 + -20n + n2 = 0

Factor a trinomial.
(5 + -1n)(15 + -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 '(15 + -1n)' equal to zero and attempt to solve: Simplifying 15 + -1n = 0 Solving 15 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + -1n = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -1n = 0 + -15 -1n = 0 + -15 Combine like terms: 0 + -15 = -15 -1n = -15 Divide each side by '-1'. n = 15 Simplifying n = 15

Solution

n = {5, 15}

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