(n+15)(n-7)=

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Solution for (n+15)(n-7)= equation:


Simplifying
(n + 15)(n + -7) = 0

Reorder the terms:
(15 + n)(n + -7) = 0

Reorder the terms:
(15 + n)(-7 + n) = 0

Multiply (15 + n) * (-7 + n)
(15(-7 + n) + n(-7 + n)) = 0
((-7 * 15 + n * 15) + n(-7 + n)) = 0
((-105 + 15n) + n(-7 + n)) = 0
(-105 + 15n + (-7 * n + n * n)) = 0
(-105 + 15n + (-7n + n2)) = 0

Combine like terms: 15n + -7n = 8n
(-105 + 8n + n2) = 0

Solving
-105 + 8n + n2 = 0

Solving for variable 'n'.

Factor a trinomial.
(-15 + -1n)(7 + -1n) = 0

Subproblem 1

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

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 = {-15, 7}

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