Math, asked by rayan7672, 6 months ago

Find the value of n. nP2 = 132. *​

Answers

Answered by bindhuaju
2

Answer:

nP2 = 72

n!/(n-2)! = 72

n*(n-1)*(n-2)! / (n-2)! = 72

n*(n-1) = 72

n^2 - n - 72 = 0

n^2 - 9n + 8n - 72= 0

(n-9) = 0, (n+8) = 0

=> n = 9, -8

We take (+) value.

Ans = 9.

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