Question

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Answer 1

Answer:

(x-y) ² + 2(x-y) (x+y) + (x+y)²

x²+y²-2xy+2x²-2y²+x²+y²+2xy

2x²+2y²+2x²-2y²

2x²+2x²=4x²

Answer 2

Explanation:

(x-y)²+2(x-y)(x+y)+(x+y)²

[#(a+b)²=a²+b²+2ab

#(a-b)(a+)=a²-b²

#(a-b)²=a²+b²-2ab

x²+y²-2xy+2(x²-y²)+x²+y²+2xy

x²+y²-2xy+2x²-2y²+x²+y²+2xy

2x²+2x²+2y²-2y²-2xy+2xy

4x²