Question

The value of (root 11+root 2) (root 11- root 2)
(A) 11
(B) 2
(C) 9
(D) 13

Answer 1

Answer = 9

Step-by-step explanation:

The expression is in the form of an identity.

(a+b) (a-b) = a²- b²

Then,

$(\sqrt{11} + \sqrt{2} ) \: ( \sqrt{11} - \sqrt{2} ) \:$

$= ( \sqrt{11} ^{2} ) - (\sqrt{2} ^{2} )$

= 11 - 2

= 9

Hope This Helps !!