(x²y³+xy)(x²y³-xy)÷x²y³
=(x^4y^6-x²y²)÷x²y³
=x²y³-1/y
带入 x=3 y=2得
=9×8-1/2
=71.5
(x²y³+xy)(x²y³-xy)÷x²y³,其中x=3,
3个回答
相关问题
-
（xy-x²）÷[（x²-2xy+y²）÷xy]*[(x-y)÷x²]
-
（x√x+x√y)÷(xy-y^2)--(x+√xy+y)÷(x√x-y√y)
-
化简x²+xy/x²-xy÷(x+y)÷-x/y²-xy
-
已知x÷y=3,则x²+2xy－3y²÷(x²－xy+y²)=?
-
先化简在求值(x+y)²-(x-y)(x+y)-(xy)²÷(xy),其中x,y是方程组『3x+2y
-
计算：（xy-x²）÷[（x²-2xy+y²）/xy]•（x-y）/（x²）
-
-3x²（1/3xy-y²）+4x（x²y-xy²）+x³y,其中x＝
-
x*（9x^3y-3xy^2）÷（-3x^2y）= 【（x+y）^2-（x-y）^2】÷（-4xy）=
-
[x﹙x²y²-xy)-y(x²-x³y﹚]÷3x²y
-
[x(x²y²-xy)-y(x²-x³y)]÷3x²y