Question

Factorise using identity: 9x² + 18 xy + 9y².​

Answer 1

Answer:

(3x+3y)²

Step-by-step explanation:

taking 9 as common

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

9(x+y)²....as (a+b)²=a²+2ab+b²

⇒(3x+3y)²

Answer 2

Answer:

(3x+3y) ² ans

(a+b) ² = a² +2ab +b²

using the formula