Question

Factor the following..

Answer 1

\[2r^2 + 10r - 2475 = 0\] I've been trying to factor this for about 10 minutes and I can't get it. I appreciate any help :)

Answer 2

that is because you cannot factor it. its prime.

Answer 3

So what am I supposed to do for the story problem it belongs to? Try to re do it or put no solution?

Answer 4

I would prefer to use quadratic equation formula to find the roots and then putting them in the eqn : \((x-\alpha)(x-\beta)=0\) You will get a factored eqn

Answer 5

as of now there is no solution, but is that equation correct ?
post the entire question so that we can verify

Answer 6

i am assuming r is an integer....if not, there are irrational factors.

Answer 7

It is not mentioned that r must be rational, so it is possible to have 2 solns but they will be irrational.

Answer 8

yeah, then follow @mathslover 's method.

Answer 9

well actually I think I just figured out what I did wrong. I forgot to multiply everything by the time it they were apart so now its factoring, thanks for everyone's help though :)

Answer 10

@brandi2013 can you please post here what you got, so that we can check it also! If you want.

Answer 11

Though, good work.

Answer 12

Or check it : approx . answers :

-37.76
32.76

^ These are two solns ...

Answer 13

The original question: Trains A and B leave the same city at the same times, headed east and north respectively. Train B travels 5 mi/h faster than train A. After 2 hrs they are 50 miles apart. Find the speed of each train.

Answer 14

Ok! so r u sure you attempted it correctly or u need someone to check it?

Answer 15

I actually got a hold of my friend in the same class to check it and she got the same answer I think its correct

Answer 16

I hope your friend did right. :) Best of Luck @brandi2013 :)