Question

find the value of (x+y)2 +(x-y) 2​

Answer 1

Answer:

2x+2y + 2x - 2y

4x is the answer

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Answer 2

Answer:

2(x²+y²)

Step-by-step explanation:

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

using identity

(x+y)²= x²+y²+2xy

and

(x-y)²= x²+y²-2xy

${x}^{2} + {y}^{2} + 2xy + {x}^{2} + {y}^{2} - 2xy$

x²+y²+x²+y² (°•° 2xy-2xy=0)

2x²+2y²

2(x²+y²)

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