Question

(x+2y)²=x²+______ +4y²​

Answer 1

Answer:

(x+2y)² = x² + 4xy + 4y²

Step-by-step explanation:

let, a = x & b = 2y

Using Identity 1 : (a+b)² = a² + 2ab + b²

Therefore, (x+2y)² = (x)² + 2(x*2y) + (2y)²

= x² + 4xy + 4y²

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Answer 2

Answer:

4xy

Step-by-step explanation:

We know that

(a+b) ^2 = a^2+2ab+b^2

Therefore,

(x+2y)^2=x^2+2*x*2y+(2y)^2

=x^2+4xy+4y^2

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