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conghp
2 năm trước
Giải phương trình sau: a, (x+1)(x+2)(x+4)(x+8)=28x ² b, Giải hệ Phương trình sau: $\left \{ {{x^2-xy+y^2=3(x-y)} \atop {x^2+xy+y^2=7(x-y)^2}} \right.$ Mấy mod làm ơn giúp với ạ
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