Question

(x+y )^2 =x^2 +2xy + y^2 give an example in which the particular this identity is applied ​

Answer 1

Let,

• x = 1
• y = 2

Now,

» R.H.S.

= (x + y)²

= (1 + 2)²

= 3²

= 9

»L.H.S.

= x² + 2xy + y²

= 1² + 2 × 1 × 2 + 2²

= 1 + 4 + 4

= 9

Since , R.H.S. = L.H.S.

Therefore , the identity is applied for x = 1 , and y = 2 , where we find the value of square of their sum .