(n-4)(n-9)=0

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Solution for (n-4)(n-9)=0 equation:


Simplifying
(n + -4)(n + -9) = 0

Reorder the terms:
(-4 + n)(n + -9) = 0

Reorder the terms:
(-4 + n)(-9 + n) = 0

Multiply (-4 + n) * (-9 + n)
(-4(-9 + n) + n(-9 + n)) = 0
((-9 * -4 + n * -4) + n(-9 + n)) = 0
((36 + -4n) + n(-9 + n)) = 0
(36 + -4n + (-9 * n + n * n)) = 0
(36 + -4n + (-9n + n2)) = 0

Combine like terms: -4n + -9n = -13n
(36 + -13n + n2) = 0

Solving
36 + -13n + n2 = 0

Solving for variable 'n'.

Factor a trinomial.
(4 + -1n)(9 + -1n) = 0

Subproblem 1

Set the factor '(4 + -1n)' equal to zero and attempt to solve: Simplifying 4 + -1n = 0 Solving 4 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1n = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1n = 0 + -4 -1n = 0 + -4 Combine like terms: 0 + -4 = -4 -1n = -4 Divide each side by '-1'. n = 4 Simplifying n = 4

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 = {4, 9}

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