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If P(x)=ax^(2)+bx+c and Q(x)=-ax^(2)+dx+...

If `P(x)=ax^(2)+bx+c` and `Q(x)=-ax^(2)+dx+c` where `ac!=0` then `P(x)Q(x)=0` has atleast

A

at least three real roots

B

no real root

C

at least two real roots

D

two real and two imaginary roots.

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