Question

Factorise completely:(x+y)^2-1​

Answer 1

Answer:

Step-by-step explanation:

Given that,

( x + y )² - 1

= (x + y )² - ( 1 )²

= (x + y - 1 ) ( x + y + 1 ) is the answer. ( ∵ a²- b²= (a - b ) (a + b ). Here ,a = x+y ,b= 1 )