早教吧作业答案频道 -->数学-->
化简求值答案(x³-2y³-3x²y)-[3(3x³-2y³)-4x²y]x=－2y=－1请先化简,然后求值,
题目详情
化简求值答案
(x³-2y³-3x²y)-[3(3x³-2y³)-4x²y] x=－2 y=－1
请先化简,然后求值,
(x³-2y³-3x²y)-[3(3x³-2y³)-4x²y] x=－2 y=－1
请先化简,然后求值,
▼优质解答
答案和解析
(x³-2y³-3x²y)-[3(3x³-2y³)-4x²y]=
(x³-2y³-3x²y)-9x³+6y³+4x²y=
-8x³+4y³+x²y=
-8*(-2)³+4*(-1)³+（-2）² *（-1）=
64-4-2=
58
(x³-2y³-3x²y)-9x³+6y³+4x²y=
-8x³+4y³+x²y=
-8*(-2)³+4*(-1)³+（-2）² *（-1）=
64-4-2=
58
看了化简求值答案(x³-2y³-3...的网友还看了以下：
解方程x(x-3)-2(x-3)=0解下列分式方程1.x-1/x-1/3=12.2x/x-1+1= 2020-05-01 …
化简[x^3(y^2-z^2)+y^3(z^2-x^2)+z^3(x^2-y^2)]/[x^3(y 2020-06-03 …
(1)x+x/2=3,解得x=2;(2)x/2+x/3=5,解得x=6;(3)x/3+x/4=7, 2020-06-07 …
1.已知x^2-4x+1=0,则x^4+1/x^4=2.如果方程a/(x-2)+3=(1-x)/( 2020-06-25 …
把下列各式分解因式:(x+y)^2-(x+y)^3要写过程哦1:(x+y)^2-(x+y)^3=2 2020-06-27 …
求未知数x20-3/5(15x+1)=182/52x-3=x+12(x-5)=8-x/22(x+8 2020-07-18 …
解方程,明早就要要,5(x-1)=12-(1-x)=-211x+1=5(2x+1)4x-3(20- 2020-07-19 …
解一元一次方程题11.y-2-18y/6=y/9+212.x+2/4-2x-3/6=113.x-1 2020-07-19 …
Limx→0（1/1-x-3/1-x^3)已经知道lim[1/(1-x)-3/(1-x^3)]=li 2020-10-31 …
1/x(x+3)+1/[（x+3）（x+6）]+1/[（x+6）（x+9）]=1/3*(1/x-1/ 2020-10-31 …