若(x+Y+Z)(x-Y+Z)=(A+B)(A-B),且B=Y,则A=
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若(x+Y+Z)(x-Y+Z)=(A+B)(A-B),且B=Y,则A=
若(x+Y+Z)(x-Y+Z)=(A+B)(A-B),且B=Y,则A=
若(x+Y+Z)(x-Y+Z)=(A+B)(A-B),且B=Y,则A=
想简单一点嘛 A=X Z=0
(a-b)+(-2a-b)=?(x+y-z)+(x-y+z)-(x-y-z)=?
(x+y-z)(x+y+z)用平方差公式(x+y-z)(x+y+z)=?(a-b+c)(a+b+c)=?
若x+y+z不等于0,a=x/y+z,b=y/x+z,c=z/x+y,则a/(a+1)+b/(b+1)+c/c+1=
填空a(x+y-z)+b(x+y-z)-c(x+y-z)=(x+y-z)乘以()
若实数x、y、z满足(x-z)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
,若实数x、y、z满足(x-z)平方-4(x-y)(y-z)=0,则下列等式一定成立的是A、x+y+z=0 B、x+y-2z=0C、y+z-2x=0 D、z+x-2y=0 尽量说一下过程!
3.若实数x,y,z满足(x-z)的平方-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
若实数x,y,z满足(x-z)²-4(x-y)(y-z)=0,则下列式子一定成立的是( )A.x+y=z B.x+z=y C.x+z=2y D.x+y=2z
若实数x,y,z满足(x-z)^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
若实数x,y,z满足(x-z)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.2x-y-z=0d.x-2y+z =0
若实数X、Y、Z满足(X-Z)的平方-4(X-Y)(Y-Z)=0,则下列成立的是:A:X+Y+Z=0 B:X+Y-2Z=0 C:Y+Z-2X=0D:Z+X-2Y=0
(z-x)2-4(x-y)(y-z)=0 求证x-2y+z=0 (提示:设x-y=a,y-z=b,则x-z=a+b)写错了是(z-x)的平凡-4(x-y)(y-z)=0 求证x-2y+z=0 (提示:设x-y=a,y-z=b,则x-z=a+b)那个平凡老是打不出来!sorry
x分之y+z=y分之z+x=z分之x+y(x+y+z不等于0),求x+y+z分之x+y-z
分式加减法:已知x+y/z=x+z/y=y+z/x(x+y+z≠0),求x+y-z/x+y+z
已知x+y/z=x+z/y=y+z/x(x+y+z≠0),求x+y-z/x+y+z的步骤
已知x+y/z=x+z/y=y+z/x(x+y+z≠0),求x+y-z/x+y+z的步骤
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
解方程组X-Y+Z=A,X+Y-Z=B,-X+Y+Z=C(A,B,C为常数)