Hello. I am having a hard time finding the Zeros to this polynomial function. Could you please explain the steps. I keep coming up with really odd answers when I factor that couldn't possibly be the zeros to this function. Thanks.
the factors of 20 are: +/- 1, +/- 2,+/- 4,+/- 5,+/- 10, +/- 20
so i started by plugging in +1, and as luck would have it, that was a root, that is, P(1)=0. i then used that to divide. however, i could have continued by plugging in the other numbers to see which gives zero. eventually you would have found that +4 and -5 are roots