(x-y)²分之x乘以x y分之x²-y² x-y分之2x 2,-2
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原式=-3xy^2*144y^2/x^2*x^3/216y^6=-2*1/y^2=-2/y^2
答案是零,左边约分剩下x/y
解题思路:关于解二次根式的计算问题,详细答案请见解析过程解题过程:
(x分之x的平方-y的平方)乘以(x的平方-2xy+y的平方分之2x)其中x=2y=1=(x^2-y^2)/x*2x/(x-y)^2=(x+y)(x-y)/x*2x/(x-y)^2=2(x+y)/(x
=(xy-x的平方)除以(x的平方-2xy+y的平方\xy)乘以(x-y\x的平方)=-x(x-y)×xy/(x-y)2×(x-y)/x2=-y再问:嗯
原式=3分之1*(x²-3xy-10y²)=3分之1*(x-5y)(x+2y)
=(x+2y)(x-2y)/(x+2)²×(x+2)/3x(x+2y)=(x-2y)/3x(x+2)=(x-2y)/(3x²+6x)
:(根号x+根号y)分之(x+y)+【根号xy乘以(根号x+根号y)】分之2xy=(x+y)/(√x+√y)+2√xy/(√x+√y)=(x+y+2√xy)/(√x+√y)=(√x+√y)^2/(√x
没写完,补充,向我追问再问:当x的二次方+4y的二次方-4x+4y+5=0时2x的二次方+xy-y的二次方分之x的四次方-y的四次方乘以xy-y二次方分之2x-y乘以(x二次方+y二次方)的平方分之y
1、(xy分之x²-y²)×(x-y分之x)-(y分之x);=(x+y)(x-y)/xy×x/(x-y)-x/y=(x+y)/y-x/y=(x+y-x)/y=12、6xy²
x(y-x)÷(x²-2xy+y²)/xy×(x-y)/x²=-x(x-y)×xy/(x-y)²×(x-y)/x²=-y
是(x-y)分之(x+y)*(x+y)分之(x-y)如果是,那么:(x-y)分之(x+y)*(x+y)分之(x-y)=1
[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
(xy-x²)乘(x-y)分之xy=-x(x-y)乘[(x-y)分之xy]=-x²y
中间是÷?再问:不是,写错了,是分解应试再问:(x²分之x²-xy)÷(y分之x-x分之y)再答:这是计算吧,怎么可能是因式分解再问:那你按计算做再答:原式=【x²分之x
x^2+4y^2-2x+4y+5=0==>(x-1)^2+(2y+1)^3+3=0无解?还是要用到虚数什么的
原式=(x+y)*x²/(x-y)(x+y)+y²/(x-y)-2xy(x-y)/(x-y)²=(x²+y²)/(x-y)-2xy/(x-y)=(x-
(xy-x²)÷xy分之x²-2xy+y²乘x²分之x-y=-x(x-y)×xy/(x-y)²×(x-y)/x²=-y∴结果与x的值没有关系
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)