Help me with this quadratic equation where the roots ia prime number

Question

If $x^2-2013x+c=0$ and the both roots of this equation is prime numbers, what is the possible number for $^3√c$?

score 2 · Answer 1 · answered Jun 05 '20 at 15:29

2

Hint:

So, the sum of prime roots is $=\dfrac{2013}1$

Now if both roots are odd, the sum will be even

answered Jun 05 '20 at 15:29

lab bhattacharjee

274,582

1

Oh i get it then x1= 2 as it is even X2= 2011, and c = 4022 okay, thank you so much for your help – ilham maha Jun 05 '20 at 15:35
Give the man a gold star! – Oscar Lanzi Jun 05 '20 at 15:38

score 1 · Answer 2 · answered Jun 05 '20 at 15:34

Hint:

You're looking for two prime numbers (the roots) adding up to $2013$. That sum is odd and so the individual roots must be one of them odd and the other even.

I guess we'll have to use brute force here, try out all the even primes we can think of for the even root, work out the odd root for each case and check that this odd number is also prime.

Help me with this quadratic equation where the roots ia prime number

2 Answers2