Question

1 identy 2 indenty 3 indenty​

Answer 1

They are

$1st \: identity \: = (x + y) ^{2} = {x}^{2} + 2xy + {y}^{2} \\ 2nd \: identity = (x - y) ^{2} = {x}^{2} - 2xy + {y}^{2} \\ 3rd \: identity \: = \: {x}^{2} - {y}^{2} = (x - y)(x + y)$

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