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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: Cho hàm số y=f(x)=ax^2+bx+c.tìm a,b,c bt rằng f(0)=1;f(1)=2;f(2)=3

Toán Lớp 7: Cho hàm số y=f(x)=ax^2+bx+c.tìm a,b,c bt rằng f(0)=1;f(1)=2;f(2)=3

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222-9+11+12:2*14+14 = ? ( )