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What is the value of x + y?
1) x2 + y2 = 17 and x * y = 4
2) x - y = 3 and x2 - y2 = 15
What is the value of x + y?
1) x2 + y2 = 17 and x * y = 4
2) x - y = 3 and x2 - y2 = 15
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helen.xia@mbawatch
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