Question

[a-(b)] [a+(-b)] =
whuich identity is used ​

Answer 1

Answer:

[a-(b)] [a+(-b)] can be written as

( a-b ) ( a-b )

and ( a-b ) ( a-b ) is written as ( a-b )²

( a-b )² = a² + b² - 2ab

Hope it helps :)

Answer 2

Answer:

Step-by-step explanation:

[a-(b)][a+(-b)]=[a-b] [a-b]

=a^2-ab-ab+b^2

=a^2-2ab+b^2

Identity used :

(a-b)^2