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For which of the following graphs the qu...

For which of the following graphs the quadratic expression `y=ax^(2)+bx+c` the product `abc` is negative ?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
(A). `(-b)/(2a)le0`
`implies-bge0[becauseale0]`
`ale0,cle0,ble0`
(B).
`(-b)/(2a)ge0implies-ble0impliesbge0`
`ale0,cle0,ble0`
`becauseabcle0`
(C).
`(-b)/(2a)ge0implies-bge0impliesble0`
`age0,cge0,ble`
`becauseabcle0`
(D).
`ale0,cle0,ble0`
`becausele0`
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