Question

If α and β are the zeroes of a polynomial x²-x-4 determine the value of α + β - αβ
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Answer 1

Answer:

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α + β = -b/a  = -1/1 ( bcz 1 and 4 both r negative and b is also negative so by -1x-1x-1=-1)

- αβ = c/a = 4/1

αβ = -4

α + β - αβ = -1 - (-4)

α + β - αβ = -1 + 4

α + β - αβ = 3

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