n^2-10n+28=7

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Solution for n^2-10n+28=7 equation:


Simplifying
n2 + -10n + 28 = 7

Reorder the terms:
28 + -10n + n2 = 7

Solving
28 + -10n + n2 = 7

Solving for variable 'n'.

Reorder the terms:
28 + -7 + -10n + n2 = 7 + -7

Combine like terms: 28 + -7 = 21
21 + -10n + n2 = 7 + -7

Combine like terms: 7 + -7 = 0
21 + -10n + n2 = 0

Factor a trinomial.
(3 + -1n)(7 + -1n) = 0

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 '(7 + -1n)' equal to zero and attempt to solve: Simplifying 7 + -1n = 0 Solving 7 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1n = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1n = 0 + -7 -1n = 0 + -7 Combine like terms: 0 + -7 = -7 -1n = -7 Divide each side by '-1'. n = 7 Simplifying n = 7

Solution

n = {3, 7}

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