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

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


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

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

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

Multiply (-9 + n) * (-9 + n)
(-9(-9 + n) + n(-9 + n)) = 0
((-9 * -9 + n * -9) + n(-9 + n)) = 0
((81 + -9n) + n(-9 + n)) = 0
(81 + -9n + (-9 * n + n * n)) = 0
(81 + -9n + (-9n + n2)) = 0

Combine like terms: -9n + -9n = -18n
(81 + -18n + n2) = 0

Solving
81 + -18n + n2 = 0

Solving for variable 'n'.

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

Subproblem 1

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

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 = {9, 9}

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