神马作文网(-3x²-2y)·(-3 2x²-3 4y 2)
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/12 17:03:06
6（x-y）6次方再问：要步骤谢谢再答：把(x-y)乘起来指数相加得到（x-y）的6次方，2×3等于6，两者相乘得6（x-y）6次方
(x-y)^2-(x-y)^3=(x-y)^2[1-(x-y)]=(x-y)^2(1-x+y)2.（x+y）^2-（x+y）^3=（x+y)^2[1-(x+y)]=(x+y)^2(1-x-y)3、（x
写清楚点点比如说前面是X/X还是X/(X-Y)打上括号分段这样才能清楚的做
(x+y)(x+y)^2(-x-y)^3=－(x+y）^6
3x^2(x-y)+6x(y-x)=3x^2(x-y)-6x(x-y)=(x-y)(3x^2-6x)=3x(x-y)(x-2)
X+Y分之X-Y等于3x=-2yX+Y分之2(x-y)减X+Y分之3X+Y=(-x-3y)/(x+y)=1
因为(x-y)/(x+y)=3,则(x＋y)/(x－y)＝1/3则5(x-y)(x+y)-(x+y)/2(x-y)＝5*3-1/(3*2)=15-1/6=89/6
(-x-2y)*(3x-y)=-3x^2-5xy+2y^2
(x-y)^5*(y-x)^3*(x-y)^2=-(x-y)^5*(x-y)^3*(x-y)^2=-（x-y）^(5+3+2)=-(x-y)^10
(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方=x²-2xy-3y²-x²+4y²-x²+2xy-y²=(x²-
=(x-y)[(3x+y)-(2x+3y)]*(x-y)=(x-y)*(x-y)(3x+y-2x-3y)=(x-y)(x-y)(x-2y)到底是化简,还是?=(x*x-2xy+y*y)(x-2y)=x
解题思路：根据题意，由整式的运算的知识整理，分析可以求得解题过程：
解代数式得：-3x的平方y-2y的三次方因为1/2的平方=-1/2的平方,所以结果仍正确给分吧!嘿嘿!
(x+4)·(-2x)-(x+1)(x-1)+(-3x+2)(x+1)=-2x²-8x-(x²-1)+(-3x²-x+2)=-2x²-8x-x²+1-
[(x+y/x-y)^2*(2y-2x/3x+3y)]-[(x^2/x^2-y^2)/(x/y)]={[(x+y)/(x-y)]^2*(2y-2x)/(3x+3y)}-[x^2/(x^2-y^2)*y
[x(x^2y^2-xy)-y(x^2-x^3y)]/(3x^2y)={x[xy(xy-1)]-y[x²(1-xy)]}/(3x²y)=[x²y(xy-1)-yx&sup
(x+y)^2-3(x+y)=(x+y)(x+y-3)
(2X-3y)-(5x-y)=2x-3y-5x+y=2x-5x-3y+y=(2x-5x)+(-3y+y)=-3x-2y这样写总是全过程了吧
原式等于2x^2-xy+6xy-3y^2-8x+4y=2x^2+5xy-3y^2-8x+4y
(x+y)^2-(x+y)^3=(1-x-y)(x+y)^2(x-y)^2-(x-y)^3==(1-x+y)(x-y)^2