因式分解1)2x³y—4x平方y平方+2xy³ 2）x4次方—2x平方y平方+y4次方 3）3m(x—y)+2(y—x)平方

显示全部楼层 · 2012-12-20 20:09:54

1)2x3y—4x平方y平方+2xy3 =2xy(x2-2xy+y2)=2xy(x-y)22）x4次方—2x平方y平方+y4次方=(x2-y2)2=(x+y)2(x-y)2 3）3m(x—y)+2(y—x)平方=3m(x-y)+2(x-y)2=(x-y)[3m+2(x-y)]=(x-y)(3m+2x-2y)...

千问 · 2012-12-20 20:09:54

1)2x3y—4x平方y平方+2xy3 =2XY(X^2-2XY+Y^2)=2XY(X-Y)^2 2）x4次方—2x平方y平方+y4次方 =(X^2-Y^2)^2=(X+Y)^2(X-Y)^2 3）3m(x—y)+2(y—x)平方=3m(X-Y)+2(X-Y)^2=(X-Y)(3m+2X-2Y)...

千问 · 2012-12-20 20:09:54

1)2x3y-4x2y2+2xy3=2xy(x2-2xy+y2)=2xy(x-y)22)x^4-2x2y2+y^4=(x2-y2)2=(x+y)2(x-y)23)3x(x-y)+2(y-x)2=(x-y...