Question

1. 5×11×13+13 is a _____ number.
2. for a,b (a≠b) rational number (√a+√b) (√a-√b) is a ______ number.​

Answer 1

Answer:

I can't understand.......

Answer 2

Answer:

1. It is a composite number(product of any two numbers is a composite number)

Step-by-step explanation:

=13(5*11+13)

=13(55+13)

=13(68)