Question

If alpha, beta are the zeroes of the polynomial f(x)=x²- 5x + 4 then find the value of 1/alpha+1/beta-2alphabeta

Answer 1

f(0)=0²-5*0+4
=0-0+4
=4 and for polynomial

Answer 2

the zeroes for this polynomial are 4 and 1 so.. 
1/4 + 1/1 - 2(4)(1) 
1/4 + 1 - 8 
1/4 - 7 
-27/4