分式xy分之一-4x的三次方分之y-搜答案-搜搜考试网

[8x^3y^3-(-xy^2)^2]/a=-x^2y^2+1/8*xy^3a=(8x^3y^3-x^2y^4)/(1/8*xy^3-x^2y^2)=-8xya/4x=-2y

见图

即(3x-4y)(x+y)=03x=4y或x=-y若3x=4yy=3x/4则y²=9x²/16,xy=3x²/4原式=(3x²/4-3x²)/(9x&

-4x的三次方+xy²=x(y²-4x²)=x(y+x)(y-x)

原式=(x^4+xy³)-(2y^4+2x³y)=x(x³+y³)-2y(x³+y³)=(x-2y)(x³+y³)=(x

4x³-xy²=x(4x²-y²）=x(2x-y)(2x+y)

再问：谢谢大神再答：有问题继续密我

x²y³-2x(4xy³)=x²y³-2x²y³=-x²y³

(4x的三次方y+6x的二次方y的二次方-xy的三次方)÷2xy=xy(4x²+6xy-y²)÷2xy=2x²+3xy-0.5y²

=xy(4x²+4xy+y²)=xy(2x+y)²

4x的三次方y+4x²y²+xy的三次方=xy（4x²+4xy+y²）=xy（2x+y）²

单项式-x的三次方(4k-1)y的平方与2分之一xy的平方仍是单项式4k-1=1k=1/2

x³y-xy³=xy(x²-y²)=xy(x+y)(x-y)

x/4+x^3-x^2=(x/4)(1+4x^2-4x)=(x/4)(2x-1)^2

xy(x+y)²-4x³y³=xy[(x+y)²-4x²y²]=xy(x+y+2xy)(x+y-2xy)

(1)x的二次方/x-1然后再减x-1.原式=[x^2-(x-1)^2]/(x-1)=(x^2-x^2+2x-1)/(x-1)=(2x-1)/(x-1)x^2就是x的2次方(2)(x三次方分之一减x二

4x³-xy²=x(4x²-y²)=x[(2x)²-y²]=x(2x+y)(2x-y)

∵x²+y²+6x-2y+10=0∴(x²+6x+9)+(y²-2y+1)=0即(x+3)²+(y-1)²=0由平方的非负性可得(x+3)&

(XY-1)的平方与(X+0.5)的平方互为相反数(XY-1)²+(X+0.5)²=0x+0.5=0,x=-0.5xy-1=0,y=-2xy=10.5(4X^3*Y-X*Y^3)-

原式=(-4)*(-2)*(x*x²)y³=8x³y³