Question

find the value of k for which X =-a is a zero of polynomial x×x+ 4ax- k

Answer 1

Hiiii Dear.....
Here is ur answer.......
Here ,x= -a
Given polynomial=x^2+4ax +k
k=??????
Now....
(-a)^2+4a(-a) +k
a^2-4a^2+k
-3a^2+k
-3a^2=-k
k=3a^2 .......
Ur answer will be k =3a^2