2x2+2y2-2(2x2+xy-3y2+xy)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/21 15:56:17
2x2+2y2-2(2x2+xy-3y2+xy)
4x2-2y2+xy2-3(-3x2+5y2-2xy2)
-4ab+5ac-3bc+5ab-6ac-6cb
yx²-y+x²y+x-2(xy²-yx)
5x²−6x³+3x³−2x+3x²+x²−x³−x
4x2-2y2+xy2-3(-3x2+5y2-2xy2)
-4ab+5ac-3bc+5ab-6ac-6cb
yx²-y+x²y+x-2(xy²-yx)
5x²−6x³+3x³−2x+3x²+x²−x³−x
2x2+2y2-2(2x2+xy-3y2+xy)
=2x²+2y²-4x²-2xy+6y²-2xy
=-2x²+8y²-4xy
4x2-2y2+xy2-3(-3x2+5y2-2xy2)
=4x²-2y²+xy²+9x²-15y²+6xy²
=13x²+7xy²-17y²
-4ab+5ac-3bc+5ab-6ac-6cb
=ab-ac-9bc
yx²-y+x²y+x-2(xy²-yx)
=x²y-y+x²y+x-2xy²+2xy
=2x²y+x-y+-2xy²+2xy
5x²−6x³+3x³−2x+3x²+x²−x³−x
=-4x³+9x²-3x
=2x²+2y²-4x²-2xy+6y²-2xy
=-2x²+8y²-4xy
4x2-2y2+xy2-3(-3x2+5y2-2xy2)
=4x²-2y²+xy²+9x²-15y²+6xy²
=13x²+7xy²-17y²
-4ab+5ac-3bc+5ab-6ac-6cb
=ab-ac-9bc
yx²-y+x²y+x-2(xy²-yx)
=x²y-y+x²y+x-2xy²+2xy
=2x²y+x-y+-2xy²+2xy
5x²−6x³+3x³−2x+3x²+x²−x³−x
=-4x³+9x²-3x
(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
x2-(a+b)xy+aby2 x2+4xy-5y2 x2-5x+3 2x2+xy-y2-4x+5y-6
2x2-xy+3y2因式分解
x2 y2+3xy+2 因式分解
已知x2+xy=3,xy+y2=-2,则2x2-xy-3y2的值为( )
如果M=3x2-2xy-4y2,N=4x2+5xy-y2,则8x2-13xy-15y2等于( )
已知X2次方+XY=3,XY+Y2次方=-2,求下例值:X2次方-Y2次方
已知2x=3y,求xy/(x2+y2)-y2/(x2-y2)的值
1,1,X2-1-2xy+y2
因式分解:x2-2xy+y2-z2.
分解因式:x2-2xy+y2-9
在x2+2xy-y2,-x2-y2+2xy,x2+xy+y2,4x2+1+4x中,能用完全平方公式分解因式的有( )个