Question

If α and β be the zeros of the polynomial f(y) = y2 – y – 4 , the value of 1/ α + 1/ β - α β is​

Answer 1

Answer:

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Answer 2

Answer:

f(x)= y^2 -y-4

1/alpha+1/beta-alpha.beta=?

alpha+beta=-b/a

alpha.beta=c/a

By given information:

a=1

b= -1

c= -4

alpha+beta= -b/a= 1

alpha.beta= c/a= -4

1/alpha+ 1/beta- alpha.beta= alpha+beta/alpha.beta-alpha.beta

1/(-4)+4

=3.75