Question

simplify (3-√11) (3+√11) of rs aggarwal

Answer 1

(3-√11)(3+√11)

#first method

(A-B)(A+B)=A^2-B^2

so, using the identity

we get 3^2-√11^2

9-11

-2 is the answer

#second method

multiply the bracket

we get,

9+3√11-3√11-11

9-11

-2 is the answer