n^2-10n+18=9

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Solution for n^2-10n+18=9 equation:


Simplifying
n2 + -10n + 18 = 9

Reorder the terms:
18 + -10n + n2 = 9

Solving
18 + -10n + n2 = 9

Solving for variable 'n'.

Reorder the terms:
18 + -9 + -10n + n2 = 9 + -9

Combine like terms: 18 + -9 = 9
9 + -10n + n2 = 9 + -9

Combine like terms: 9 + -9 = 0
9 + -10n + n2 = 0

Factor a trinomial.
(1 + -1n)(9 + -1n) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(9 + -1n)' equal to zero and attempt to solve: Simplifying 9 + -1n = 0 Solving 9 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1n = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1n = 0 + -9 -1n = 0 + -9 Combine like terms: 0 + -9 = -9 -1n = -9 Divide each side by '-1'. n = 9 Simplifying n = 9

Solution

n = {1, 9}

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