-3xy-x+1=1-(______) a-(b+c-d)=a-b-(_______)
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-3xy-x+1=1-(______) a-(b+c-d)=a-b-(_______)
-3xy-x+1=1-(______) a-(b+c-d)=a-b-(_______)
-3xy-x+1=1-(______) a-(b+c-d)=a-b-(_______)
1-(3xy+x)
a-b-(c-d)
-3xy-x+1=1-(x+3xy)
a-(b+c-d)=a-b-(c-d)
-3xy-x+1=1-(______) a-(b+c-d)=a-b-(_______)
计算:(-3x^2y)*(1/3xy^2)=______
代数式x²-8+(1/3)xy-3y²+3kxy中不含xy项,则k=______ 不含xy项该怎么理解?
(3)4x的平方+4xy-3y的平方=0 分解为______和_________(4)x的平方+2xy+y的平方=1,分解为____和______
9x^2-30xy+______=(3x-______)^2
曲线y=1/x与xy=2的交点是______.求详解!
一、已知y=x-1,那么x²-2xy+3y²-2的值是______.二、已知1/x-1/y=3,则代数式2x-14xy-2y/x-2xy-y的值为______.PS:
已知(x+1)*(x+1)=-Iy-1I,求2(xy-(5xy)*(5xy))-3((xy)*(xy)-xy)
-1/3x²y²+xy=( )(xy-3)
-xy-3/1y平方+(x平方=3xy)
【 】-【X平方+3XY】=-XY-1/3Y平方
( )-(x^2+3xy)=-xy-1/3y^2
因式分解:x-xy^2=_____,169x^2y^2-1=____.ab^3-a^3b=____,(x-y)^2-1=_____.x^3-16x^2+64x=______,2x^2-4x+2y^2=______.25(x-y)^2-10(x-y)+1=______
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
先化简,再求值:x^x+xy/x^x-xy^(y^y-xy/xy)除以(x+y),其中x=1/3,y=-3
当x=3,y=3分之1时,求代数出3xy-[2xy-2(xy-2分之3xy)+xy]+3xy的值
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思,是3x-2xy-3y/x-2xy-y
[6xy-3(xy-1/2x的平方y]/3xy=?