9(x+y)^2-12(x^2-y^2)+4(x-y)^2

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/05 02:45:46

9(x+y)^2-12(x^2-y^2)+4(x-y)^2
昂.帮莪

9(x+y)^2-12(x^2-y^2)+4(x-y)^2
=[3(x+y)]^2-12(x+y)(x-y)+[2(x-y)]^2
=(3x+3y)-2(3x+3y)(2x-2y)+(2x-2y)^2
=[(3x+3y)-(2x-2y)]^2
=(x+5y)^2

x^2-y^2/x+y-4x(x-y)+y^2/2x-y, 4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解, 1、x(x-y)(x+y)-x(x+y)^2 已知4x=9y求(1)x+y/y (2)y-x/2x 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 (2x-y)^2-4(x-y)(x+2y) (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) {(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y x+2y+4y^2/x-y+4x^y/4y^2-x^2 (x-y)^2+12(x-y)+36 4x(y-x)-y^2因式分解