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The roots of ax^(2) +bx +c =0 " whose "...

The roots of ` ax^(2) +bx +c =0 " whose " a ne 0, b ,c in R `, " are non-real complex and " a + c lt b, " then

A

`ac gt 0`

B

`ab gt 0`

C

`bc gt 0`

D

exactly two of ab, bc and ca are positive

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A
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  13. If the equation x^(3) + ax^(2) + b = 0, b ne 0 has a root of order 2, ...

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