3x平方y乘以(-2x立方y平方等于多少
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[3a^3/(x+y)]^3*(x^2-y^2)/[(y-x)/(x+y)]^2=27a^9/(x+y)^3*(x+y)*(x-y)*(x+y)^2/(x-y)^2=27a^9/(x-y)
4x^2y-(3x^3+2xy^2-x^2y)+(y^2x+3x^3+3)=5x^2y-xy^2+3=-60-18+3=-75再问:==、就是先化简(去括号,合并同类项)再求值
导数做:y=x^3-3x^2+2xy'=3x²-6x+2k=y/x=(x^3-3x^2+2x)/x=x²-3x+2=y'=3x²-6x+22x²-3x=0,约去
(5x³-7x³y+3x²y)+2x³-(-7x³y+3x²y+7x³)=(5x³+2x³-7x³)
2xy²+3x³-x²yx降幂就是x的次数越来越低那么变为3x³-x²y+2xy²
x*x+2*x+y*y-6y+10=0x*x+2*x+1+y*y-6*y+9=0(x+1)*(x+1)+(y-3)*(y-3)=0x=-1y=3所以答案是-3
3a(y+x)平方+6a(y+x)立方提取3a(y+x)平方,原式=3a(y+x)的平方+2(y+x)提取(y+x),原式=(y+x)乘以(3ay+3ax+2)
原式=5x²+3y³-3x³+4y²-[5x²+3y³-2(3x³-4y²)]+[(5x²+3y³)
(-2x的平方y的立方)的2次方乘以(-3x的平方y)的立方除以(-2分之1x的5次方y的4次方)=4x^4y^6×(-27x^6y^3)÷(-1/2x^5y^4)=-108x^10y^9÷(-1/2
再问:最后一个是y的平方你写错了再问:最后一个是y的平方你写错了再答:你的题目打的是立方???
(-3xy)立方*2x立方/(-3x平方y)=-27x^3y^3*2x^3/(-3x^2y)=18x^4y^2
(2x立方-3x平方y-2xy平方)-(X立方-2XY²)+(-X立方+3X²Y-Y立方)=2x³-3x²y-2xy²-x³+2xy
x^2y-xy^2+x^3-y^3=x^2y-y^3+x^3-xy^2=y(x^2-y^2)+x(x^2-y^2)=(x+y)(x^2-y^2)=(x+y)^2(x-y)不懂还可以问(⊙o⊙)哦再问:
[1]y+2分之y的平方-6y+9除以[3-y]=(3-y)²/(y+2)×/(3-y)=(3-y)/(y+2)[2]x的立方分之x的平方y乘以[-y分之1]=x²y/x³
(x-y)^2(x-y)^3*(y-x)^2*(y-x)^3=-(x-y)^2(x-y)^3*(x-y)^2*(x-y)^3=-(x-y)^10
(x+y)的立方乘以(2x+2y)的平方乘以(3x+3y)的平方=(x+y)的立方乘以4(x+y)的平方乘以9(x+y)的平方=36(x+y)的7次方如追加其它问题,采纳本题后点击想我求助,再问:为什
6(x+y)立方-2(x+y)平方=2(x+y)平方【3(x+y)-1】=2(x+y)平方(3x+3y-1)
解可用如下方式:当x=1或2时y=0当1