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Suppose a parabola y=ax^(2)+bx +c has t...

Suppose a parabola `y=ax^(2)+bx +c` has two x intercepts, one negative, and its vertex is (2,-2). Then which of the following is true ?

A

` ab gt 0`

B

` bc gt 0`

C

`ac gt 0`

D

`a +b+c gt 0`

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The correct Answer is:
B
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