Question

the mean of (2+a),a,(2-a)​

Answer 1

Answer:

by using identity,

(a+b)(a-b)=a^2-b^2

Step-by-step explanation:

=2^2-a^2

=4-a^2

Answer 2

Answer:

(a+b)(a-b)=a^2-b^2

2^2-a^2

4-a^2