【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】
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【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】【21a
【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】
【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】
【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】
【21a^3(x-y)^2】/【14a^2x(x^2-y^2)】
=3a(x-y)/[2x(x+y)]
分母为0啊
题目有问题
【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】
=[3*7*a^3*(x-y)^2]/[2*7*a^2*x*(x+y)(x-y)]
=[3a(x-y)]/[2x(x+y)]
[21a^3(x-y)^2]/[14a^2x(x^2-y^2)]?
=[21a^3(x-y)^2]/[14a^2x(x+y)(x-y)]
分子分母都有7a^2(x-y)约去
=[3a(x-y)]/[2x(x+y)]
【21a^3(x-y)^2】/【14a^2x(x^2-x^2)】
36a^3(x-y)^2/27a(y-x)
5a(x-y)^2+10a(y-x)^3
已知x+y+z=3a,(a≠0,x,y,z不全等).求(x-a)(y-a)+(y-a)(z-a)+(z-a)(x-a)/(x-a)^2+(y-a)^2+(z-a)^2
x+y+z=3a(a不等于0,x,y,z不全相等)求[(x-a)(y-a)+(y-a)(z-a)+(z-a)(x-a)]/[(x-a)^2+(y-a)^2+(z-a)^2]
已知X+Y+Z=3a求(X-a)(Y-a)+(Y-a)(Z-a)+(Z-a)(X-a)/(X-a)2;+(Y-a)2;+(Z-a)2;,a≠0,X,Y,Z不全相等,
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a(x+y)^2+4a-4a(x+y)
1 (1/3a+b)(1/3a+b) 2 (2x-y)-2(x+2y) 3 (x-y+3)(x-y-3) 4 (-x+y)^21 (1/3a+b)(1/3a+b) 2 (2x-y)-2(x+2y) 3 (x-y+3)(x-y-3) 4 (-x+y)^2
a(x-3)(y-2)+b(3-x)(2-y)
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3a(x+y)-2(y+x)因式分解