If alpha and beta are the roots of the e...

If `alpha` and `beta` are the roots of the equation `x^2+ax+b=0`, then `1/alpha^2+1/beta^2` is equal to

A

`(a^2-2b)/b^2`

B

`(b^2-2a)/b^2`

C

`(a^2-2b)/b^2`

D

`(b^2+2a)/b^2`

Verified by Experts

The correct Answer is:

A

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