likewise p(-1) equals ZERO so (x+1) is a factor of p(x) now we have found out that a=1, in (x+a) out of 3 factors of p(x) we have found out one, we need to solve the quadratic to find the other two we can solve for the quadratic in two ways... the first method is to simply divide both sides by (x+1) we need to divide p(x) by (x+1) observe the steps carefully... the first method gave us all the 3 factors of p(x) now lets see second method... we shall not factorize at all but yet find all the factors of p(x)... 