Question

If 1 is a zero of the polynomial p(x) =ax^2-3(a-1)x-1,then find the value of a

Answer 1

if x=1 is a factor of p(x).
then a(1)2-3(a-1)(1)-1=0
2a-3a+3-1=0
-a=-3+1
-a=-2
so, a=2

Answer 2

put x =1 in the function

u will get a =1