x²-2y分之x 2-x²-4x 4分之x-1

原式=(x+2y)(x-2y)/(x+y)^2*2x(x+y)/x+2y=2x(x-2y)/(x+y)很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意回答】按钮,

2x-y分之x+y=2,则2x-y=2(x+y)4x-2y分之x+y-4x+4y分之2x-y=2(2x-y)分之x+y-4(x+y)分之2x-y=4(x+y)分之x+y-4(x+y)分之2(x+y)=

你可以发个图给个题目吗,这样不知那些是分子,那些是第二项a再问：好吧再问：再答：再答：图中的第二题，你们是一个班的吧？问的问题都一样再问：应该不是再问：第4题就两个步骤？再答：是的再问：最后一步是x-

x+y分之4x-2y-2x-y分之4x+4y=2(2x-y)/(x+y)-4(x+y)/(2x-y)=2*2-4*(1/2)=4-2=2

y=x-1分之根号下4-x2+lg(4x+3)x-1≠0x≠14-x^2≥0-2≤x≤24x+3>0x>-3/4所以定义域(-3/4,1)U(1,2])记得采纳啊

（x²+2x+1）/（x²-y²）÷（x+1）/（x-y）=（x+1）²/（x+y）（x-y）×（x-y）/（x+1）=（x+1）/（x+y）【俊狼猎英】团队为

1x^2y分之x^4=x²/y2ab分之ab-b^2(b不等于0）=1-b/a36abc^2分之36ab^3c=6b²/c4a^2-b^2分之（a+b)^3=（a+b）²

=2x/(x+2)(x-2)-(x+2)/(x+2)(x-2)=[2x-(x+2)]/(x+2)(x-2)=(2-x)/(x+2)(x-2)=-1/(x+2)

X2+Y2+8X+6Y+25=0x²+8x+16+y²+6y+9=0(x+4)²+(y+3)²=0∴x+4=0y+3=0x=-4y=-3X2+4XY+4Y2分之

因为x+y分之2x-y=2又因为x+y分之4x-2y是它的2倍所以x+y分之4x-2y就=4因为x+y分之2x-y=2倒过来2x-y分之x+y就为1/2又2x-y分之4x+4y是2x-y分之x+y的4

原式=（x+1）/（x-1）-x(x-2)/(x+1)(x-1)÷(x-2)(x+1)/(x+1)²=（x+1）/(x-1)-x/(x-1)=(x+1-x)/(x-1)=1/(x-1)请好评

x+2y+4y^2/(x-2y)-4x^2y/(x-4y^2)=x+2y+4y^2/(x-2y)-4x^2y/[(x+2y)(x-2y)]通分,分母为[(x+2y)(x-2y)]=(x+2y)(x+2

x的2次方-2x分之x+2再-去x2次方-4x+4分之x-1=x(x-2)分之x+2-(x-2)²分之x-1=x(x-2)²分之(x+2)(x-2)-x(x-2)²分之x

x²+2x+1=10（x+1)²=10x+1=3或x+1=-3所以x=2或x=-4【（x²+4)/x-4】÷【（x²-4)/(x²+2x)】=【（x&

发照片呀再问：请原谅手机不行再问：请帮我一下，谢谢。再答：看不明白再问：你写出来就行了的再答： 再答：是这样吗再问：嗯，麻烦把过程写详细点再答：我说题目对不再问：是的再问：对的再问：还有一个

原式=[3x(x-2y)-x(x+2y)]/(x+2y)(x-2y)×(x+2y)(x-2y)/x=3(x-2y)-(x+2y)=2x-8y请检查题目原式=[(a+b)/(a-b)-b/(a-b)]×

原式=x（x-2)^2/[x(x-2)((x^2-4)]=1/(x+2)由原式得到其定义域x≠0,2,-2（分母不等于0,即x^2-2x≠0；x≠0；x-4/x≠0）又因为-根号5

原式=x（x-2)^2/[x(x-2)((x^2-4)]=1/(x+2)由原式得到其定义域x≠0,2,-2（分母不等于0,即x^2-2x≠0；x≠0；x-4/x≠0）又因为-根号5

x^2-y^2=2xy,得x/y-y/x=2,即（y/x)^2+2(y/x)-1=0∴y/x=-1+√2或y/x=-1-√2(舍去,因为x,y都是正数).即（x-y)/(x+y)=√2-1

原式=2x(x-y)4-x2(x-y)2+xy(x-y)2=x(x-y)2{2(x-y)2-x+y}=x(x-y)2{2(x-y)2-(x-y)}=x(x-y)3(2x-2y-1)