(2x^3y-4x^2y^3-7xy^3)÷(-2xy)写出过程Com!
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(2x^3y-4x^2y^3-7xy^3)÷(-2xy)写出过程Com!
(2x^3y-4x^2y^3-7xy^3)÷(-2xy)写出过程
Com!
(2x^3y-4x^2y^3-7xy^3)÷(-2xy)写出过程Com!
(2x^3y-4x^2y^3-7xy^3)÷(-2xy)
=xy(2x^2-4xy^2-7y^2)/(-2xy)
=-1/2(2x^2-4xy^2-7y^2)
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+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
求(3x^+y^-5xy)-【2x^-(-4xy-y^+7x^)】=?
求(3x^+y^-5xy)-【2x^-(-4xy-y^+7x^)】=?
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
化简2(x²y+xy)-3(x²y-xy)-4x²y
(-3x^y+2xy)-( )=4x^+xy
已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
X^Y-2XY^2+y^3
3(x-y)²-7(x-y)+8(x-y)²+6(x-y)求详细过程(2) 5xy-4x²y-8xy²+3xy-xy²+4x²y
x²-y²+5x+3y+4(x+y-2xy)(x+y-z)+(xy-1)²
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
x^2-4xy+3y^2=(x-3y)(x-y)x^2-4xy+3y^2 怎么分解成(x-3y)(x-y)