K
khang_pro2211


1/tìm x, y nguyển dương thỏa
6x+5y+18 = 2xy
2/tính M= (x-y)^3 + 3(x-y)(xy+1)
biết x = \sqrt[3]{3+ 2.\sqrt[2]{2}}-\sqrt[3]{3-2.\sqrt[2]{2}}
y= \sqrt[3]{17+ 12.\sqrt[2]{2}} - \sqrt[3]{17- 12.\sqrt[2]{2}}
6x+5y+18 = 2xy
2/tính M= (x-y)^3 + 3(x-y)(xy+1)
biết x = \sqrt[3]{3+ 2.\sqrt[2]{2}}-\sqrt[3]{3-2.\sqrt[2]{2}}
y= \sqrt[3]{17+ 12.\sqrt[2]{2}} - \sqrt[3]{17- 12.\sqrt[2]{2}}
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