Question

18.
What must be added to the polynomial f(x)
= x + 2x - 2x2 + x - I so that the resulting
polynomial is exactly divisible by x + 2x .- 3?​

Answer 1

ans.

f {x}= x+2x-2x2+x-1

     = -2x2+4x-1

    x+2x-3

   =3x-3=0

     3x=3

     x=3/3

     x=1

    f {1}  =-2{1}^2+4{1}-1

             =-2+4-1

           =-3+4

         x=1