Question

If a and b are the roots of the polynomial f(x)=x2-x-4.Find the value of the following equation 1/a + 1/b -ab​

Answer 1

Step-by-step explanation:

1/a+1/b-ab

(a+b)/ab- ab

a+b= sum of roots= 1

ab= product of roots= -4

so

1/(-4)+4

15/4

3.75