Question

20. Find the number to be added to the polynomial r - 5r + 4. so that 3 is the zero of the
polynomial​

Answer 1

Answer:

r,-5r+4=3

r-5r=3-4

-4r=-1

$r = \frac{ - 1}{4}$

Answer 2

Answer:

-8 should be added to get 3 as zero of the polynomial

Step-by-step explanation:

P(3)=3-5×3+4+8

     =3-15+4+8

     =3-11+8

     =   -8+8

     =0              

                              hence proved.