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A binary operation * on the set of rational numbers is defin...

A binary operation * on the set of rational numbers is defined as xy=x2y22xy. Find 53

A.

815

B.

815

C.

1715

D.

1715

Correct answer is A

p>xy=x2y22xy=(x+y)(xy)2xy53=(5+3)(53)2(5×3)=2×82(5×3)=815