化简求值(x y)(x-y)-(x-2y)的平方-(6x的平方y-2xy的平方)
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/30 02:27:12
x^2+2xy+y^2/x^2-y^2除以x^2+xy/xy-y^2=(x+y)²/(x+y)(x-y)÷x(x+y)/y(x-y)=(x+y)/(x-y)×y(x-y)/x(x+y)=y/
(x-2)²+∣y-3∣=0(x-2)²=0,∣y-3∣=0x=2y=3(x-y)/(x²-2xy+y²)-(xy+y²)/(x²-y
(2x²y-2xy²)-【(-3x²y²+3x²y)】=2x²y-2xy²+3x²y²-3x²y=-
3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy²=3x²y-2xy²+2xy-3x²y-xy+3xy²=
(xy-x的平方)除以xy分之x的平方-2xy+y的平方乘x的平方分之x-y=x(y-x)*xy/(x-y)²*(x-y)/x²=-y再问:不好意思,打错了(xy-y的平方)除以x
[(xy-2)²+4xy-4]÷(xy)=(x²y²-4xy+4+4xy-4)÷(xy)=x²y²÷xy=xy=10×1/25=2/5
xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y}=xy-2[xy-(3x²y-xy²-0.5xy)+4x²y]=xy-2(x
先化简在求值(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],=1/9x²y²*(2x²y-xy²-2x²y+2xy&
化简求值:(x+y)(x-y)-(x-y)²-6x²y÷2y+(2xy)²÷(-4xy)=(x-y)²-(x-y)²-3x²-1/2y=-3
解3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²=3x²y-(2xy-2xy+3x²y+xy)+3xy²=3x²y
6xy+7y)+【8x-(5xy-y+6x)】=xy+8y+2x=xy+2(4y+x)=5-2=3
√x^-2xy+y^2+x^2-6xy+9y^2/x-3y=√(x-y)^2+(x-3y)^2/x-3y由于y>x=y-x+x-3y=-2y=-2√5
(xy-x²)÷(x²-2xy+y²)/(x-y)×(x-y)/x²=-x(x-y)÷(x-y)²/x²=-x(x-y)×x²/(
/>1、化简[1-(2x/x+y)]÷(x²-2xy+y²/3x+3y)+(x²+xy/x²-y²)=[(x+y)/(x+y)-(2x)/(x+y)]
2(x²y+xy)-3(x²y+xy)-4x²y=-(x²y+xy)-4x²y=-5x²y-xy=-xy(5x+1)=1×2(-5+1)=-
x,y都可以解出来了还问
(负三分之一xy)²[xy(2x-y)-2x(xy-y²)]=1/9x²y²(2x²y-xy²-2x²y+2xy²)=1
(x+y)(x-y)-(x-y)²-6x²y/2y+(2xy)²/(-4xy)=x²-y²-x²+2xy-y²-3x²-
(x+y)(x-y)-(x-y)²-6x²y除2y+(2xy)²除(-4xy)=x²-y²-x²+2xy-y²-6x²-
(3x-2y+3xy)-(x-4y-2xy)=3x-2y+3xy-x+4y+2xy=2x+2y+5xy=2(x+y)+5xy=2*3+5*(-2)=6-10=-4