By simplifying \((\sqrt{7}+\sqrt{5}) * (\sqrt{7}-\sqrt{5})\), we get __________

(a) 24

(b) 2

(c) 12

(d) 74

This question was addressed to me by my school teacher while I was bunking the class.

My doubt stems from Representing Real Numbers on the Number Line & Real Numbers Operations in section Number Systems of Mathematics – Class 9

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