0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/14 01:25:34
0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?0.
0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?
0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?
0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?
先对原式化简,0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y=（0.2-0.3+0.7）X^2Y-0.5XY^2=0.6X^2Y-0.5XY^2=XY（0.6X-0.5Y）,然后将X,Y值带入.=（-1）×2/3×【0.6×（-1）-0.5×2/3】=2/3×14/15=28/45
（x^2+xy/x-y)/（xy/x-y)计算
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
(-x-y)(x^2+xy+y^2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
x^2-xy/xy-y^2约分
.(x+y-2)(x+y-2xy)+(xy-1)^2
(x^2-xy)y÷y-x/xy怎么做?
代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy
(x+y)/x /(x-(2xy-y^2)/x) 因式分解
0.2X^2Y-0.5XY^2-0.3X^2Y+0.7X^2Y,当x=-1,y=2/3时,最后=?
(xy-x²)÷(x²-2xy+y²/xy)×（x-y/x²）
x-y/x²÷x²-2xy+y²/xy*（xy-x²）
X-Y/2X+2Y XY/X+Y²
因式分解：x×x-xy-2y×y-x-y
（y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
(x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy]