(2x-y)+(x+3y)(x-3y)=
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(2x-y)+(x+3y)(x-3y)=(2x-y)+(x+3y)(x-3y)=(2x-y)+(x+3y)(x-3y)=5x²-4xy-8y²5x-2xy-8y
(2x-y)+(x+3y)(x-3y)=
(2x-y)+(x+3y)(x-3y)=
(2x-y)+(x+3y)(x-3y)=
5x²-4xy-8y²
5x-2xy-8y
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
2(x-y)²-3(x-y)(-y-x)
3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12
把6x(x-y)的平方+3(y-x)的立方分解因式我知道答案是6x(x-y)^2+3(y-x)^3=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]=3(x-y)^2(x+y)可为什么=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]
y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
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[(x-y)²+(x+y)(x-y)]/2xx=3,y=-1.5
(2x-y)+(x+3y)(x-3y)=
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2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
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