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If P(x)=a x^2+b x+c&Q(x)=-a x^2+dx+c...

If `P(x)=a x^2+b x+c&Q(x)=-a x^2+dx+c ,a c!=0,` then the equation `P(x)*Q(x)=0` has (a)Exactly two real roots (b)Atleast two real roots (c)Exactly four real roots (d) No real roots

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