2X平方 - 3Y平方 因式分解
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/04 23:43:14
双十字叉乘法直接出结果(2x+y+2)(x+y+1)再问:不懂,可以说的更具体点么再答:怎么说呢,十字叉乘法有学过吗再问:一点点再答:十字叉乘法是解只含有一个未知数如x的因式分解,双十字叉乘法可以用来
3*((x-y/3+根号22/3*y)*(x-y/3-根号22/3*y))
(x+y)的平方-2x-2y-3=(x+y)的平方-2(x+y)-3=(x+y-3)(x+y+1)
可以使用平方差公式:m^2-n^2=(m+n)(m-n)所以(2x+y)^2-(x+2y)^2=(2x+y+x+2y)(2x+y-x-2y)=(3x+3y)(x-y)=3(x+y)(x-y)
Y^2(2X+1)(X-3)
=(x+y)的平方-3(x+y)+2(把x+y看成一个整体)=(x+y-1)(x+y-2)
(x+y)(x+2y)=x²+xy+2xy+2y²=x²+3xy+2y²
=x²+2xy+3x+y²+3y+2=(x+y)²+3(x+y)+2=(x+y+1)(x+y+2)
3(x-2y)-x²y(2y-x)=3(x-2y)+x²y(x-2y)=(x-2y)(3+x²y)
(x+2y)的平方-4x的平方=(x+2y+2x)(x+2y-2x)=(3x+2y)(2y-x)
3a(x-y)-2(y-x)^2=3a(x-y)-2(x-y)^2=(x-y)[3a-2(x-y)]=(x-y)(3a-2x+2y)
3(x+y)的平方-27=3[(x+y)^2-9]=3(x+y+3)(x+y-3)
3x^2+4xy+y^2-5x-3y+2=(3x^2+4xy+y^2)-5x-3y+2=(3x+y)(x+y)-(3x+y)-2x-2y+2=[(3x+y)(x+y)-(3x+y)]-2(x+y-1)
(4x-3y)²-16y²=(4x-3y+4y)(4x-3y-4y)=(4x+y)(4x-7y)x²+2x(y-z)+(z-y)²=x²+2x(y-z
原式=x^3+2x^2y+xy^2 =x(x^2+2xy+y^2) =x(x+y)^2再问:x-2��֮x-
xy+y平方+x-y-2=xy+x+y^2-y-2=x(y+1)+(y+1)(y-2)=(y+1)(x+y-2)
x²-y²+5x+3y+4=(x²+4x+4)-(y²-4y+4)+x-y+4=(x+2)²-(y-2)²+x-y+4=(x+y)(x-y+
等于﹣2x的平方y(1+y的平方)再问:能不能把过程也写出来!!!再答:x^2y-2x^2y^3-3x^2y=-2x^2y-2x^2y^3=-2x^2y(1+y^2)
-y平方x-4x平方y+2x的3次方=2x³-4x²y-xy²=x(2x²-4xy-y²)
x平方-4y平方-x-2y=(x+2y)(x-2y)-(x+2y)=(x+2y)(x-2y-1)