Giải phương trình: $x(x^2+9)(x+9)=22(x-1)^2$
Sử dụng " nhân tung đại pháp" rồi nhóm lại dc
$(x^2+11x-2)$ $(x^2-2x+11)$ =0 
$\Rightarrow $ xanh =0 $\Rightarrow x=\frac{-11\pm \sqrt{129}}{2}$
hoặc đỏ=0 ( loại)
Đúng click "V" cho Jin
dạ có ............... cửu âm chân kinh thì chưa dc...:D nhưng cửu dương thần công thì dc òi –  ๖ۣۜJinღ๖ۣۜKaido 01-05-16 08:47 AM
thi chyên có p số học ko nhỉ? –  Confusion 30-04-16 11:03 PM
được cái cửu âm chân kinh chưa? :D –  Confusion 30-04-16 11:01 PM

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