## askme12345 3 years ago Logic problems

So the social security polynomial : ssn(x)= (x-a1)(x+a2)(X-a3) (x+a4).. *and so on* Suppose your SS# is 121-21-2121. How many other people could have the same polynomial?

2. Hero

Lol - I agree. If your willing to try, I can explain furthur

4. Hero

Explain further anyway. Something might click

So everyone recieved a unique code that they called their "social security number" they had to plug that code into a equation called SSN(x)=(x-a1)(x+a2)(x-a3) and so on.. then a few questions were asked : a) suppose you have a SS number in which the digits a1,a3,a5,a7 are all different (accroding to the equation they are all negative) and a2,a4,a6,a8 are all different (positive) Give two SS numbers that have the same ssn(x) polynomial. and then this question b) Suppose your SSN is 121-21-2121. What would your polynomial be - It would be ssn(x)=(x-1)(x+2)(x-1)(x+2) and so on, how many other people could have the same SSN(X)?

6. Hero

What course are you currently taking?

Pre-Calculus

8. Hero

Is this question from a pre-calculus textbook? Is there a textbook associated with the course?

No, it was a project. The full handout is posted online if you want a full look

10. Hero

Okay

11. Hero

13. Hero

I don't think I like this project. But this particular question seems to be about combinations and permutations

14. Hero

How many different ways can you write 121-21-2121 ?

15. Hero

if order doesn't matter