Question

21. If one zero of the polynomial p(x) = x2 - 6x + k is twice the other then
find the value of k.​

Answer 1

Step-by-step explanation:

if one zero is a then other is 2a

since it is quadratic equation so we can write

x^2-(sum of roots)x+product of roots=0

x^2-3ax+2a^2=0

comparing

3a=6

a=2

k=2a^2=2*4=8

k=8