若2x 3y等于3_
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108,谢谢
[x(x2y2-xy)-y(x2+x3y)]÷3x2y,=(x3y2-x2y-x2y-x3y2)÷3x2y,=-2x2y÷3x2y,=-23.
有很多种可能,你参考一下吧(1)f____fruit/floor(2)_o____mother(3)d_______daughter(4)_____d__friendly(5)__n___manner
原式=(x4-xy3)+(y4-x3y)+(3xy2-3x2y)=x(x3-y3)+y(y3-x3)+3xy(y-x)=(x3-y3)(x-y)-3xy(x-y)=(x-y)(x3-y3-3xy)=(
按字母x的升幂排列就把y看成系数y4-xy3+x2y2+3x3y
1comebacktolife苏醒过来2addup总计达(还有一个空,应该是addupto)3tomyface当着我的面4.onlyto不料,却5.onlytobetold不料却被告知再问:лл��
原式=4x29y2•27y364x3•4xy=34x2.故答案为34x2.
反应前XY均为0价,反应后化合价有变化,四氧化还原反应.提一句,4X2+Y2=X3Y+Y2去掉Y2的话是4X2=X3Y,这是不可能的,元素本身发生了变化,应该是核反应
原式=x4+x3y+4x3y+x2y+4x2y2+4x2y2+xy2+4xy3+xy3+y4,=x3(x+y)+4x2y(x+y)+xy(x+y)+4xy2(x+y)+y3(x+y),=-x3-4x2
(2x4-4x3y-x2y2)-2(x4-2x3y-y3)+x2y2=2x4-4x3y-x2y2-2x4+4x3y+2y3+x2y2=2y3,因为化简的结果中不含x,所以原式的值与x值无关.
原式=(x^4-2x²y²+y^4)+6xy(x²+2xy+y²)-2xy(x+y)=(x²-y²)²+6xy(x+y)²
解题思路:某项的字母指数和为该项的次数,常数项即为常数解题过程:解:最高项是-3,最高项系数是5和4,常数项是-2
多项式-3xy+5x3y-2x2y3+5的次数是5.最高次项系数是-2,常数项是5.故答案为:5,-2,5.
已知x+y=5,xy=3,代数式x3y-2x平方y平方+xy3=xy(x²-2xy+y²)=xy(x-y)²=3×[(x+y)²-4xy]=3×(25-12)=
应该是X3y-2x2y2+xy3原式=x3y-2x2y2+xy3=xy(x2-2xy+y2)=xy(x-y)2=17/36*6=17麻烦采纳,谢谢!
多项式2-xy2-4x3y是四次三项式,其中3次项的系数是-1,故答案为:四、三,-1.
x3y+xy3=xy(x^2+y^2)=(√3-√2)(√3+√2)((√3-√2)^2)+(√3-√2)^2)=1*(3-2√6+2+3+2√6+2)=10
(1)原式=x2-(2y-3)2=x2-4y2+12y-9;(2)原式=4x6y2•(-2xy)-8x9y3÷(2x2)=-8x7y3-4x7y3=-12x7y3.
∵x-y=l,xy=2,∴x3y-2x2y2+xy3=xy(x2-2xy+y2)=xy(x-y)2=2×1=2.
3x3y-12xy3,=3xy(x2-4y2),=3xy(x+2y)(x-2y).故答案为:3xy(x+2y)(x-2y).