Question

evaluate a. (105)^2-(104)^2

Answer 1

105^2-104^2
=(105+104)(105-104
=209

Answer 2

We know that,

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

By using this formula :-

(105)^2-(104)^2

= (105+104)(105-104)

= 209×1

= 209