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X²+y²=2 xy=1 x+y= ? ​

X²+y²=2 xy=1 x+y= ? ​
asked 4.4k views
3 votes
X²+y²=2
xy=1
x+y= ? ​

asked
User Altober
by
7.8k points

1 Answer

4 votes

Answer:

2 or -2

Explanation:

x²+y²=2

(x+y)²-2xy=2

(x+y)²=4

x+y=±2

answered
User Jeeyeon
by
8.3k points
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