Question

If a and B are the zeros of the quadratic polynomial f (×)=×2-×-4 find the value of 1/a +1/b-ab​

Answer 1

Answer:

15/4

Step-by-step explanation:

f (×)=x^2 - x - 4

to find: (1/a) + (1/b) - ab

((a + b)/ ab) - ab

[a + b = 1/1 = 1

ab = -4]

((a + b)/ ab) - ab

= (1/-4) - (-4)

= -1/4 + 4

= 15/4