Question

Is the no. (3-√7)(3+√7) is a rational no. or irrational no.

Answer 1

I hope this helps u dear friend

Answer 2

heya friend

by solving the brackets we will get
(3-√7)(3+√7)
$( {3}^{2} - { \sqrt{7} }^{2} )$
then it will be 9-7=2
and 2can be written in the form of p by q and hence it is rational

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