5x2y=136353

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5x2y=136353
若m=x3-3x2y+2xy2+3y2 n=x3-2x2y+xy2-5y3,则2x3-7x2y+5x

若m=x3-3x2y+2xy2+3y2n=x3-2x2y+xy2-5y3,则2x3-7x2y+5xy2+14y2等于()若m=x3-3x2y+2xy2+3y2n=x3-2x2y+xy2-5y3,则2x3-7x2y+5xy2+14y2等于()

(5)先化简,再求值:3x2y-[2x2y-(2xy-3x2y)]+3xy2,其中x=3,y=-1/

(5)先化简,再求值:3x2y-[2x2y-(2xy-3x2y)]+3xy2,其中x=3,y=-1/3(5)先化简,再求值:3x2y-[2x2y-(2xy-3x2y)]+3xy2,其中x=3,y=1/3(5)先化简,再求值:3x2y-[2x

已知:(x+2)2+|y+1|=0,求5xy2-{2x2y-[3xy2-(4xy2-2x2y)]}的

已知:(x+2)2+|y+1|=0,求5xy2-{2x2y-[3xy2-(4xy2-2x2y)]}的值已知:(x+2)2+|y+1|=0,求5xy2-{2x2y-[3xy2-(4xy2-2x2y)]}的值已知:(x+2)2+|y+1|=0,

化简:5(3x2y-xy2) * (xy2+3x2y)

化简:5(3x2y-xy2)*(xy2+3x2y)化简:5(3x2y-xy2)*(xy2+3x2y)化简:5(3x2y-xy2)*(xy2+3x2y)5(3x^2y-xy^2)(xy^2+3x^2y)=5[(3x^2y-xy^2)(3x^2

x3+x2y-xy2-y3=

x3+x2y-xy2-y3=x3+x2y-xy2-y3=x3+x2y-xy2-y3=3x一3y

5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2 化简,再求值

5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2化简,再求值5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2化简,再求值5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x

先化简在求值,5xyz-{2x2y-[3xyz-(4xy2-x2y)]}其中x=-2,y=-1,z=

先化简在求值,5xyz-{2x2y-[3xyz-(4xy2-x2y)]}其中x=-2,y=-1,z=3先化简在求值,5xyz-{2x2y-[3xyz-(4xy2-x2y)]}其中x=-2,y=-1,z=3先化简在求值,5xyz-{2x2y-

当x=-1,y=1时求代数式2x2y-(5xy2-3x2y)-x2的值字母后面的2是平方

当x=-1,y=1时求代数式2x2y-(5xy2-3x2y)-x2的值字母后面的2是平方当x=-1,y=1时求代数式2x2y-(5xy2-3x2y)-x2的值字母后面的2是平方当x=-1,y=1时求代数式2x2y-(5xy2-3x2y)-x

已知(x+3)2+1x-y+101=0,求5x2y-[2x2y-(3xy-xy)2-3x2]-2xy

已知(x+3)2+1x-y+101=0,求5x2y-[2x2y-(3xy-xy)2-3x2]-2xy-y2已知(x+3)2+1x-y+101=0,求5x2y-[2x2y-(3xy-xy)2-3x2]-2xy-y2已知(x+3)2+1x-y+

先化简,再求值.3x2y-[2x2y-(xyz-2xz2)-3x2y]-2xyz,其中x=1,y=-

先化简,再求值.3x2y-[2x2y-(xyz-2xz2)-3x2y]-2xyz,其中x=1,y=-2,z=-1先化简,再求值.3x2y-[2x2y-(xyz-2xz2)-3x2y]-2xyz,其中x=1,y=-2,z=-1先化简,再求值.

若x-y=5,xy=14,则x3-x2y+xy2-y3=?

若x-y=5,xy=14,则x3-x2y+xy2-y3=?若x-y=5,xy=14,则x3-x2y+xy2-y3=?若x-y=5,xy=14,则x3-x2y+xy2-y3=?x-y=5,xy=14x²+y²=(x-y)&

若x+y=5,xy=6,求x2y+xy2的值

若x+y=5,xy=6,求x2y+xy2的值若x+y=5,xy=6,求x2y+xy2的值若x+y=5,xy=6,求x2y+xy2的值x^2y+xy^2=xy(y+x)=6*5=3030303024x^2×y+xy^2=xy(x+y)=6×5

-5x2y2+10xy3-15x2y 因式分解

-5x2y2+10xy3-15x2y因式分解-5x2y2+10xy3-15x2y因式分解-5x2y2+10xy3-15x2y因式分解用提取公因式法,公因式是-5xy∴-5x²y²+10xy³-15x²

4x2y-{x2y-「3xy2 – 1/ 2(4x2y-8xy2)+x2y」}-5xy2 在此题中2

4x2y-{x2y-「3xy2–1/2(4x2y-8xy2)+x2y」}-5xy2在此题中2是x或y的平方(2次方)4x2y-{x2y-「3xy2–1/2(4x2y-8xy2)+x2y」}-5xy2在此题中2是x或y的平方(2次方)4x2y

单项式-3x2依次减去单项式-4x2y,-5x2,2x2y的差为_________.

单项式-3x2依次减去单项式-4x2y,-5x2,2x2y的差为_________.单项式-3x2依次减去单项式-4x2y,-5x2,2x2y的差为_________.单项式-3x2依次减去单项式-4x2y,-5x2,2x2y的差为____

化简 5(3x2y-xy2)- (xy2+3x2y)怎么算啊

化简5(3x2y-xy2)-(xy2+3x2y)怎么算啊化简5(3x2y-xy2)-(xy2+3x2y)怎么算啊化简5(3x2y-xy2)-(xy2+3x2y)怎么算啊5(3x2y-xy2)-(xy2+3x2y)=5xy(3x-y)-xy(

(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.

(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.(4xy^2-2x^2y)-(-x^3-y^3)=x^

dy/dx=3x2y怎么解?详细的解答是 3x2y

dy/dx=3x2y怎么解?详细的解答是3x2ydy/dx=3x2y怎么解?详细的解答是3x2ydy/dx=3x2y怎么解?详细的解答是3x2ydy/dx=3x2ydy/y=3x2dxlny=x^3+cy=Ce^(x^3)

先化简再求值3x2y(-4xy2)+5xy(-6xy)2其中x=1y=-1/2

先化简再求值3x2y(-4xy2)+5xy(-6xy)2其中x=1y=-1/2先化简再求值3x2y(-4xy2)+5xy(-6xy)2其中x=1y=-1/2先化简再求值3x2y(-4xy2)+5xy(-6xy)2其中x=1y=-1/23x&

设A=x3+3x2y-2xy2+4y3-1,B=y3-xy2+x2y-2x3,C=-x3+4x2y-

设A=x3+3x2y-2xy2+4y3-1,B=y3-xy2+x2y-2x3,C=-x3+4x2y-3xy2+5y3+5.求证:不论x,y取任何有理数,多项式A+B-C的值总等于一个常数,并求出这个常数设A=x3+3x2y-2xy2+4y3