If alpha and beta are the zeros of the quadratic polynomial x²-x-4 ,find the value of 1/alpha +1/beta-alpha*beta
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x^2-x-4
1/a+1/b - ab
b+a/ab - ab
-b/a/c/a - c/a
-b/c - c/a
1/4+4/1
17/4
1/a+1/b - ab
b+a/ab - ab
-b/a/c/a - c/a
-b/c - c/a
1/4+4/1
17/4
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