(4y分之3x)^2乘以3x分之2y加上2y^分之x^2

(4x²-4x+1)+(y²-6y+9)=0(2x-1)²+(y-3)²=0平方大于等于0,相加等于0,若有一个大于0,则另一个小于0,不成立.所以两个都等于0

[3a^3/(x+y)]^3*(x^2-y^2)/[(y-x)/(x+y)]^2=27a^9/(x+y)^3*(x+y)*(x-y)*(x+y)^2/(x-y)^2=27a^9/(x-y)

不知道能不能看见,结果是（6根号2）X

原式=-3xy^2*144y^2/x^2*x^3/216y^6=-2*1/y^2=-2/y^2

[x(x+y)/2(x+2y)]X[3(x-y)/x(x+2y)]X[(x+2y)(x+2y)/3(x+y)(x-y)]=1/2再问：能分开吗再答：[x(x+y)/2(x+2y)]X[3(x-y)/x

(3x^2/4y)*(2y/3x)+(x^2/2y^2)/2y^2/x=x/2+x^3/4y^4=(2y^4*x+x^3)/4y^4=x(x^2+2y^4)/4y^4.

1、√3（√2x-√3y)=3一√2(√3x-√2y)=4二二式子减去一式子得到y=1x=√6

=(x+2y)(x-2y)/(x+2)²×(x+2)/3x(x+2y)=(x-2y)/3x(x+2)=(x-2y)/(3x²+6x)

∵单项式-2x*4y与单项式2/3x*my²次数相同∴4+1=m+2∴m=3∴2/3x*my²×（-2x*4y）=2/3×（-1）*3×（-3）²×[-2×（-1）*4×

(8x^2/9y^2)*(3y/-4x)=-2x/3y不懂请追问,满意请采纳~再问：过程？？？？再答：就相当于（8x的平方除以-4x）乘以(3y除以9y的平方）=-2x乘以3y分之一=负的3y分之2x

4-4x+x^2分之2x-6除以（x+3)乘以3-x分之x^2+x-6=2(x-3)/(x-2)²×1/(x+3)×(x+3)(x-2)/(3-x)=-2/(x-2)

[(x-2)分之3x-2分之x]×x分之(x²-4)=[2(x-2)分之6x-2(x-2)分之(x²-2x)]×x分之[(x+2)(x-2)]=2(x-2)分之(4x-x²

[3x分之2-（x+y分之2）乘以[3x分之x+（y-x^2-xy）]除以x分之x-y{2/3x-2/(x+y)*[x/3x+(y-x²-xy)]}÷(x-y)/x题目错了吧?再问：{3x分

[1]y+2分之y的平方-6y+9除以[3-y]=（3-y)²/(y+2)×/(3-y)=(3-y)/(y+2)[2]x的立方分之x的平方y乘以[-y分之1]=x²y/x³

原式=(x^2-8x+16)^3(x+1)^6/(x^2-2x+1)^3(x-4)^4(x+2)^2=(x-4)^6(x+1)^6/(x-1)^6(x-4)^4(x+2)^2=(x-4)^2(x+1)

您好：X方-4X+4Y方+4Y+5=0（x²-4x+4）+(4y²+4y+1)=0(x-2)²+(2y+1)²=0x-2=0x=22y+1=0y=-1/2（3分

1乘以2分之x+2乘以3分之x+.+2012乘以2013分之x=2012(1-1/2+1/2-1/3+……+1/2012-1/2013)x=2012(1-1/2013)x=20122012/2013x

4-4x+4x的平方分之2x-6除以(x-3)乘以3-x分之(x+3)乘以(x-2)=(2x-6)÷4÷(x-3)×(x+3)÷(3-x)×(x-2)=(x-3)÷2÷(x-3)×(x+3)÷(3-x

原式=5x根号(xy)/3根号(y/x)*1/3根号(x/y)=5/9*根号(xy*x/y*x/y)=5x/9y根号(xy)

(4x/z)-(5y/z)=-2……①(x/z)-(4y/z)=3……②方程②×4得,(4x/z)-(16y/z)=12……③①-③得,11y/z=-14,∴y/z=-14/11代入②得,(x/z)-