-2x^2y(-2xy^2)^2+(2xy)^3X(xy^2)
将其展开 =-4x^3y^5+2x^2y^5
提公因式 =(-2x^2y^5)(2x-1)
3xy【2xy-x(y-2)+x】
=3xy(xy+3x)
=3x^2y^2+9x^2y
(x+2)(x+3)-(x+6)(x-1)
=x^2+5x+6-x^2-5x+6
=12
(3/2x^2+xy-3/5y^2)·(-4/3x^2 y^2)
=-2/x^4y^2-4/3xy+4/5x^2
-2x^2y(-2xy^2)^2+(2xy)^3X(xy^2)
将其展开 =-4x^3y^5+2x^2y^5
提公因式 =(-2x^2y^5)(2x-1)
3xy【2xy-x(y-2)+x】
=3xy(xy+3x)
=3x^2y^2+9x^2y
(x+2)(x+3)-(x+6)(x-1)
=x^2+5x+6-x^2-5x+6
=12
(3/2x^2+xy-3/5y^2)·(-4/3x^2 y^2)
=-2/x^4y^2-4/3xy+4/5x^2