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X²+y²=2 xy=1 x+y= ?
asked
Dec 22, 2022
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X²+y²=2
xy=1
x+y= ?
Mathematics
high-school
Altober
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Altober
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1
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Answer:
2 or -2
Explanation:
x²+y²=2
(x+y)²-2xy=2
(x+y)²=4
x+y=±2
Jeeyeon
answered
Dec 29, 2022
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Jeeyeon
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