what identity use in this question
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Two identities can be used
![1. \: {(x + y)}^{2} \\ 2. \: {(x - y)}^{2} 1. \: {(x + y)}^{2} \\ 2. \: {(x - y)}^{2}](https://tex.z-dn.net/?f=1.+%5C%3A++%7B%28x+%2B+y%29%7D%5E%7B2%7D++%5C%5C+2.+%5C%3A++%7B%28x+-+y%29%7D%5E%7B2%7D+)
kanchankbala:
hw we fill this identities in this equation
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