Toán Lớp 7: Tìm x ; y \in Z biết:
a. 25-y^{2}=8(\mathrm{x}-2009)
b. x^{3} y=x y^{3}+1997
c. x+y+9=xy-7
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Toán Lớp 7: Tìm x ; y \in Z biết:
a. 25-y^{2}=8(\mathrm{x}-2009)
b. x^{3} y=x y^{3}+1997
c. x+y+9=xy-7
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Mik gửi nha
Cho mik xin ctlhn nhé bn