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Question

If a>0 and b24ac>0, then the graph of y=ax2+bx+c

A
lies entirely above the x-axis.
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B
is concave upwards and cuts the x-axis.
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C
touches the x-axis and lies below it.
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D
is concave downwards.
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Solution

The correct option is B is concave upwards and cuts the x-axis.
It has two real roots. So, it cuts x-axis twice.
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