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Show that the product of the roots of a ...

Show that the product of the roots of a quadratic equation `ax^(2)+bx+c=0 (a ne 0)` is `(c )/(a)`.

A

`(-b+sqrt(b^2+4ac))/(ac)`

B

`(-b-sqrt(b^2-4))/3`

C

`(-b-sqrt(b-4ac))/2`

D

`(-b+-sqrt(b^2-4ac))/(2a)`

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