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Maiphuong2001
2 năm trước
Chứng minh rằng nếu : $c^{2}$ + 2(ab - ac - bc) = 0 ; b $\neq$ c ; a+b $\neq$ c thì $\frac{a^{2}+(a-c)^{2}}{b^{2}+(b-c)^{2}}$ =$\frac{a-c}{b-c}$
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