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(x^(2)+1)^(2)-x^(2)=0 has (i) four rea...

`(x^(2)+1)^(2)-x^(2)=0` has
(i) four real roots (ii) two real roots
(iii) no real roots (iv) one real root

A

four real roots

B

two real roots

C

no real root

D

one real root

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