2x-<2(x+4)-3(x+2y)>-2y 其中x=-1,y=-2 合并同类项并求值2x-<2(x+4)-3(x+2y)>-2y其中x=-1,y=-2合并同类项并求值(要过程快!)
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 22:50:22
x)3x9Ft &tE\J0PȨRi';: Own{:/mlzڰqh/5|E&$?$ ր /`kTaTmk\kV$DfpQ ϤR*lO56F0a]c]8F 1% +N
把6x(x-y)的平方+3(y-x)的立方分解因式我知道答案是6x(x-y)^2+3(y-x)^3=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]=3(x-y)^2(x+y)可为什么=6x(x-y)^2-3(x-y)^3=3(x-y)^2[2x-(x-y)]
化简((X-2Y)的平方+(X-Y)(x+Y)-2(X-3Y)(X-Y))除以Y
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
把(x+y),(x-y)个作为一个整体合并同类项1,7(x+y)-2(x+y)-4(x+y)+2(x+y)2,(x-y)²+2(x-y)-(x-y)-2(x-y)²
1.(-2a)³·b²÷(8a³b²) 2.-5x(2x²-3x+4)+4x³+15x3.(x²-2y²)(x+2y)-2xy(x-y)4.(x-y+z)(x-y-z)化简求值 [(x+y)(x-y)-(x+y)²-2y(x-2y)]÷(-2y),其中x=5,y=2003
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
[(x+2y)(x-2y)+4(x-y)²]÷6x
已知x+y=-2,试计算1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y的值
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
化简2x-(5x-3y)+(7x-y)
1/2x-(x+y/2x -x-y)÷(x+y)
若x+y=4,则多项式½(x+y)+4﹙x-y)-3(x-y)-3/2(x+y)-x+y是多少?
因式分解x²(x-2y)+y²(2y-x)
先化简再求值 [(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1
3X-2Y)(X+Y)-X(3X-Y),其中X=2/3,Y=9/2 9(X-3)(X-2)-5(X-5)(2X-1)+3(X+1)(3X-4)其中X=-1/2
说明理由(5x³-7x³y+3x³y)+2x³-(-7x³y+3x²y+7x³)的值与x、
(4x-2y²)-[5x-x+y²]-x 化简!
(1) √3_____{x|x≤2},(1,2)____{(x,y)|(1) √3_____{x|x≤2},(1,2)____{(x,y)|y=x+1}(2) √2+√5_____{x|x≤2+√3}(3) {x|x/1=x,x∈R}______{x|x的立方-x=0}(4)设U=R,A={x|a≤x≤b}