Question

if one of the zeros of cubic polynomial x cube +axsquare +bx +c is -1 then find the product of the other two zeroe
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Answer 1

Answer:

Step-by-step explanation:

Given equation is x³+ax²+bx+c

Let the roots be p,q,r

One of the roots is  p= -1

Sum of the roots→p+q+r = -a

⇒q+r=1-a

Now, pq+qr+rp=b

      ⇒ -q+qr-r=b ⇒ -(q+r)+qr=b ⇒ qr=b+q+r ⇒qr=b+1-a

(Using the relation q+r solved above)