Question

(√11-√7)*(√11+√7)=?​

Answer 1

Answer:

hey mate

(√11-√7)*(√11+√7)

= (√11)²-(√7)²

= 11-7

= 4

using identity

(a+b)*(a-b) = a²-b²

hope it will help you

Answer 2

Answer:

11-7=4

Step-by-step explanation:

This is in the form of (a+b) *(a-b) which equals to( a^2 - b^2) therefore root 11 square - root 7 square is equal to 4