Question

given question is equvivant
to​

Answer 1

Answer:

${(x + y + 1)}^{2}$

Step-by-step explanation:

Using

${(x + y)}^{2} = {x}^{2} +2xy + {y}^{2}$

MARK AS BRAINLIEST

Answer 2

Step-by-step explanation:

(x+y)² + 2(x+y) + 1

=> (x+y)² + 2(x+y) + (1)²

=> { (x+y) + 1 } ²

=> (x+y+1)²