若有理数x、y、z满足(x-y)²-4(x-y)(y-z)=0,则下列式子一定成立的是:A:x+y+z=0B:x+y-2z=0C:y+z-2x=0D:z+x-2y=0
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若有理数x、y、z满足(x-y)²-4(x-y)(y-z)=0,则下列式子一定成立的是:A:x+y+z=0B:x+y-2z=0C:y+z-2x=0D:z+x-2y=0
若有理数x、y、z满足(x-y)²-4(x-y)(y-z)=0,则下列式子一定成立的是:
A:x+y+z=0
B:x+y-2z=0
C:y+z-2x=0
D:z+x-2y=0
若有理数x、y、z满足(x-y)²-4(x-y)(y-z)=0,则下列式子一定成立的是:A:x+y+z=0B:x+y-2z=0C:y+z-2x=0D:z+x-2y=0
∵﹙x-z﹚²-4﹙x-y﹚﹙y-z﹚=0,
∴[(x-y)+(y-z)]²-4﹙x-y﹚﹙y-z﹚=0
∴[(x-y)-(y-z)]²=0
z+x-2y=0
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