化简求值(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3其中x=-3y=-2如题
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/26 04:35:07
![化简求值(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3其中x=-3y=-2如题](/uploads/image/z/1859173-61-3.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%280.2x%5E3-x%5E2y-xy%5E2%29-%28xy%5E2-x%5E2y-0.5x%5E3%29%2B0.3x%5E3%E5%85%B6%E4%B8%ADx%3D-3y%3D-2%E5%A6%82%E9%A2%98)
x){3g6033֭3ԭ3 Q=S1~ںɎƕFO5\4&HJB_`gCA1`-@DP$~O'X60WkiAy6yvPڀ9O?o20D.dg) 2m
u;{z@6}5m#$ v
化简求值(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3其中x=-3y=-2如题
化简求值(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3其中x=-3y=-2
如题
化简求值(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3其中x=-3y=-2如题
(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3
=x^3(0.2+0.5+0.3)-x^2y+x^2y-xy^2-xy^2
=x^3-2xy^2
=-27-2*36
=-99
原式=0.2x^3-x^2y-xy^2-xy^2+x^2y+0.5x^3+0.3x^3
=x^3+(-2xy^2)
当x=-3,y=-2时,原式=-27+24=-3
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,y=-2
化简求值x-4y/2x-7xy+3y×x-2xy-3y/2x+3xy-2y÷3x-6y/4x-4xy+y,其中:x=1999,y=-1
3xy²-[xy-2(xy-3/2x²y)+3xy²]+3xy²,其中x=3,y=-1/3 化简求值
5x²y-[2²y-(3xy-xy²)-3x²]-2xy²-y²化简求值x=-3,y=-7
化简求值:3x²y-[2xy-2(xy-3/2x²y)+xy],其中x=3,y=-1/3如题
(3x-2y+3xy)-(x-4y-2xy),其中x+y=3 xy=-2 化简求值
化简求值:(-1/3XY)²[xy(2x-y)-2x(xy-y²)],其中X=-3/2,Y=-2
化简求值3x-2y-5xy-(2x-3y+2xy),其中x+y=4,xy=-7
化简求值,(2x-3y-4xy)-(x-4y+2xy),其中x+y=5,xy=-3
4xy-[(x²+5xy-y²)-(x²+3xy-2y²)],其中x=2,y=-1求值与化简
化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,y=-1/3
化简求值:根号x^-2xy+y^2 + x^2 -6xy+9y^2/x-3y,其中x=根号3,y=根号5
化简并求值2(x^2y+xy)-3(x^2y+xy)-4x^2y,其中x=-2,y=1/2
化简求值:2(x的平方y+xy)-3(x平方y+xy)-4x平方y,其中x=-1,y=2
化简求值:2(x的平方y+xy)-3(x的平方y-xy)-4x的平方y,其中x=1,y=负1
化简求值:2(x的平方y+xy)-3(x平方y-xy)-4x平方y,其中x=-1,y=1
化简求值【x(x^2y^2-xy)-y(x^2-x^3y]/3x^2y,其中x=3y=1/2
(2xy-3)(2xy+3)+(xy+3)^2化简求值 x=1/5 y=-2