Question

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algebraic identities​

Answer 1

Step-by-step explanation:

${(x - y)}^{2} = 81 \\ = > {x}^{2} + {y}^{2} - 2xy = 81 \\ = > {x}^{2} + {y}^{2} = 81 + 2(16) \\ = > {x}^{2} + {y}^{2} = 113$

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Answer 2

Answer:

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Step-by-step explanation:

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