作业帮若|2 3x-6| |0.2 2y|=0,则x的平方 y的平方=
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因为根号x-3y+6与绝对值y-5互为相反数,所以二者相加为0,又因为二者同时都大于或等于零,所以只能都为0则x-3y+6=0y-5=0可解得x=9,y=5x+y=14,x-y=4
2X+3Y-1=X+62X+3Y=7(1)Y-X-8=X+62X-Y=-14(2)(1)+(2)4X+2Y=-7两边除以22X+Y=-7/2
x−y+（y-2）2=0，∵x−y≥0，（y-2）2≥0，∴x-y=0，y-2=0，解得：y=2，x=2，∴xy=4．
(x+y)^2=36x^2+y^2+2xy=36x^2+y^2=36-2*2.75=30.5(x-y)^2=x^2+y^2-2xy=30.5-2*2.75=25x-y=5或者-5已知x-y>0x-y=
(x-y)^2*(y-x)^2*(x-y)^6=(x-y)^2*(x-y)^2*(x-y)^6=(x-y)^10再问：能详细一点吗?我,初一的再答：(x-y)^2=(y-x)^2=(x-y)^2*(x
原式=(x-y)[(x-y)^2-6(x-y)+9]=(x-y)(x-y-3)^2很高兴为您解答,祝你学习进步!不懂可追问!
(1)已知x+y=6,x²-y²=5,x^2-y^2=(x+y)(x-y)=5x-y=5/(x+y)=5/6（2）若x+y=3,x²+y²=5(x+y)^2=3
(x-y)x^6+(y-x)y^6=(x-y)x^6-(x-y)y^6=(x-y)(x^6-y^6)=(x-y)(x³+y³)(x³-y³)=(x-y)(x+y
(x+y)ˆ2-2(x+y)(x-y)+(x-y)ˆ2=（x+y-x+y）^2=(2y)^4=4y^2如果满意请点击右上角评价点【满意】即可~再问：这个我看不懂，能不能写下来啊，谢
3x+4y=x+2y+62x-x+4y-2y=62x+2y=6x+y=6/2x+y=3
(x+y+z)²+(x-y-z)(x-y+z)-2·z(x+y)=(x+y)²+2z(x+y)+z²+(x-y)²-z²-2z(x+y)=(x+y)&
∵被开方数要大于等于0∴x+1≥0且-(x+1)²≥0∴x+1=0,x=-1∴y﹤0+0+5,y﹤5原式=√(y-5)²+|x+1|=|y-5|+|x+1|=-(y-5)+0=5-
3X=60X=2020+y=6y=-14
X²+Y²+4X-2Y+1=0(X+2)²+(Y-1)²=4由上述方程可知-4≤X≤0X²-6X+Y²-2Y=X²-6X-（X&#
7y(x-3y)²-2(3y-x)³=7y(x-3y)²+2(x-3y)³=(x-3y)²[7y+2(x-3y)=(x-3y)²(7y+2X
若(x-y)/(x+y)=3那么x-y=3(x+y)x-y=3x+3y故x=-2y所以(x+2y)/(6x-7y)=(-2y+2y)/(6*(-2y)-7y)=0如果不懂,请Hi我,祝学习愉快!
x（x*x-1)+x(5-x*x)-6y+7=-x+5x-6y+7=2(2x-3y)+7=2*(-4)+7=-8+7=-1再问：能在写详一点吗-x+5x-6y+7再答：x（x*x-1)+x(5-x*x
∵x²-y²=12∴(x+y)(x-y)=12∵x+y=6…………①∴x-y=2…………②①+②得2x=8x=4把x=4代入①得4+y=6y=2∴x=4,y=2很高兴为您解答,祝你
由X-Y>X可得Y＜0由X+Y
|x|+y=12,x+|y|=6x>=0时,x+y=12x+|y|=6,|y|-y=-6,无解x