Pls ans this fassttt
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Answer:
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Answered by
1
Step-by-step explanation:
x+y=81
x+y²=81² (a+b)²
= a²+2ab+b²
x²+2xy+y²
4
x²+6+y²= 6561
x²+y² = 6561-6
= 6555
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