(Z-X)"-4(X-Y)(Y-Z)=0 证明X-2Y+Z=0 ‘"’是平方
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(Z-X)"-4(X-Y)(Y-Z)=0证明X-2Y+Z=0‘"’是平方(Z-X)"-4(X-Y)(Y-Z)=0证明X-2Y+Z=0‘"’是平方(Z-X)"-4(X-Y)(Y-Z)=0证明X-2Y+Z
(Z-X)"-4(X-Y)(Y-Z)=0 证明X-2Y+Z=0 ‘"’是平方
(Z-X)"-4(X-Y)(Y-Z)=0 证明X-2Y+Z=0 ‘"’是平方
(Z-X)"-4(X-Y)(Y-Z)=0 证明X-2Y+Z=0 ‘"’是平方
因为：(z-x)^2-4(x-y)(y-z)=0
所以：[(x-y)+(y-z)]^2-4(x-y)(y-z)=0
所以：(x-y)^2+2(x-y)(y-z)+(y-z)^2-4(x-y)(y-z)=0
即：(x-y)^2-2(x-4)(y-z)+(y-z)^2=0
所以：[(x-y)-(y-z)]^2=0
所以：x-2y+z=0
x-y=a，y-z=b，则x-z=a+b
(z-x)^2-4(x-y)(y-z)=0
(a+b)^2-4ab=0
(a-b)^2=0
a=b
x-2y+z=(x-y)+(z-y)=a-b=0
2x+z=10 x+y-z=4 3x-y-z=0
x+y+z=4,x-y+z=0,x-z=8怎么解?
(x+y-z)(x-y+z)=
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