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- Thread starter Tyrion101
- Start date

- #1

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- #2

mfb

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Anyway, I would do it like that:

As a+b=-23, we can write b=-23-a.

Plug this into a*b=2050 and you get a regular quadratic equation. With the numbers in your post, it does not have solutions, but with other numbers it has.

- #3

verty

Homework Helper

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2050

2 - 1025

5 - 205

5 - 41

41 - 0

2050 is 2.5^2.41

Knowing the small primes helps. For example, I knew that 41 is prime. But also, there is an easy way to check. If a number n is composite, it has a prime factor ≤ ##\sqrt{n}##. So with 41, if it is composite, it has a prime factor < 7, so check 2,3,5, none divides it, so it is prime.

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