B
becon_matech997


1/Phân tích thành nhân tử:
a/[TEX](x^2-1)+2(y-xz)+(z^2-y^2)[/TEX]
b/[TEX]a(a^2-b^2-c^2)+b(b^2-c^2-a^2)[/TEX]
THANKS BÀ KON NHÌU
a/[TEX](x^2-1)+2(y-xz)+(z^2-y^2)[/TEX]
b/[TEX]a(a^2-b^2-c^2)+b(b^2-c^2-a^2)[/TEX]
THANKS BÀ KON NHÌU
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