October 2018 1 33 Report

1. Wskaż, że jeśli x2+y2=2 i x+y=2, to x=y=1

2. wykaż że jeśli z2+y2=3 i x+y=-2, to xy= 1/2

3. Wskaż, ze jeśli x2+y2=3 i x+y=-2, to xy=- 1/2


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