2X^4Y^3-6X^3Y^4+3X^2Y^2等于什么啊?

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/08/23 10:48:36

=(x 3y)(x^4-5x^2y^2 4y^2) =(x 3y)(x^2-y^2)(x^2-4y^2显然原式不等于33 x^5 3x^4y-5x^3y^2-15x^2y^3 4xy
再问：谢谢啊，，我可能提问错了，题目是12X的4次方Y的3次方-6x的3次方y的4次方+3x的2次方y的2次方

(x-2y)2+(x+2y)(x-2y)-(x-3y)(x-y)计算结果是什么?x等于-4,y等于0.5代入后是多少第一 (3x-2y)(9x^2+4y^2)(3x+2y)等于什么若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 x/4+2等于x,x=多少.y/5等于y-3,Y=多少 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y( x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 (x+3y-4)(2x-y) 4x=-6y两边同时-(2X-3y)合并等于4x-(2x-3y)=-6y-(2x-3y)等于2x+3y=-3y-2x完后