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## askme12345 3 years ago Suppose your SSN is 121-21-2121. How many other people could have the same SSN? SSN(x)= (x-a1)(x+a2)(x-a3)(x+a4) and so on..

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1. Ishaan94

What is a1, a2, a3,.... ?

2. askme12345

they are the numbers of the SSN for example if the number is 121-21-2121 in the SSN(x)- (x-1)(x+2)(x-1)(x+2) and so on

3. Ishaan94

Okay so you want a SSN such that SSN(x) = SSN(x') Now your SSN is 121212121 4 2s and 5 1s and In total 9 numbers

4. Ishaan94

Do you know Permutations?

5. askme12345

barely sorry

6. Ishaan94

Hmm I am not sure, Maybe $\Huge9_{P_{4}} + 9_{P_{5}}$ $\frac{9!}{5!} + \frac{9!}{4!}$ $9\times8\times7\times6 + 9\times8\times7\times6\times5$ People can have same SSN polynomial as yours

7. askme12345

i have to state one that would be? how can i find one that is equ to 121212121

8. Ishaan94

Your SSN is unique but not your SSN polynomial

9. askme12345

yeah I understand I have to find an SSN polynomial equal to that ssn

10. TuringTest

Oh no! Not this problem again. Askme, Your teacher is a sadist!

11. Tomas.A

wtf is ssn

12. TuringTest

Social Security Number lol!

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