Question

plzz ans these questions​

Answer 1

Answer:

I have answer for 1st question

(3-√11) (3+√11)

By using this formula. (a-b) (a+b) =a^2-b^2

(3-√11) (3+√11)=3^2-√11^2 (root and square cancel)

=9-11

=2