n^2+56=15n

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Solution for n^2+56=15n equation:


Simplifying
n2 + 56 = 15n

Reorder the terms:
56 + n2 = 15n

Solving
56 + n2 = 15n

Solving for variable 'n'.

Reorder the terms:
56 + -15n + n2 = 15n + -15n

Combine like terms: 15n + -15n = 0
56 + -15n + n2 = 0

Factor a trinomial.
(7 + -1n)(8 + -1n) = 0

Subproblem 1

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

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 = {7, 8}

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