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