因式分解(超简单)1、 x^3-27y^32.8m^3+27n^33.8x^3y-18xy^34.16m^4n-54mn
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/10/04 14:17:13
因式分解(超简单)
1、 x^3-27y^3
2.8m^3+27n^3
3.8x^3y-18xy^3
4.16m^4n-54mn^4
5.50m^2-32n^2
6.x^2-4y^2--6x+9
1、 x^3-27y^3
2.8m^3+27n^3
3.8x^3y-18xy^3
4.16m^4n-54mn^4
5.50m^2-32n^2
6.x^2-4y^2--6x+9
1、 x^3-27y^3
=x^3-(3y)^3
=(x-3y)(x^2+3xy+9y^2)
2.8m^3+27n^3
=(2m)^3+(3n)^3
=(2m+3n)(4m^2-6mn+9n^2)
3.8x^3y-18xy^3
=2xy(4x^2-9y^2)
=2xy(2x+3y)(2x-3y)
4.16m^4n-54mn^4
=2mn(8m^3-27n^3)
=2mn[(2m)^3-(3n)^3]
=2mn(2m-3n)(4m^2+6mn+9n^2)
5.50m^2-32n^2
=2(25m^2-16n^2)
=2(5m+4n)(5m-4n)
6.x^2-4y^2-6x+9
=(x^2-6x+9)-4y^2
=(x-3)^2-(2y)^2
=(x+2y-3)(x-2y-3)
=x^3-(3y)^3
=(x-3y)(x^2+3xy+9y^2)
2.8m^3+27n^3
=(2m)^3+(3n)^3
=(2m+3n)(4m^2-6mn+9n^2)
3.8x^3y-18xy^3
=2xy(4x^2-9y^2)
=2xy(2x+3y)(2x-3y)
4.16m^4n-54mn^4
=2mn(8m^3-27n^3)
=2mn[(2m)^3-(3n)^3]
=2mn(2m-3n)(4m^2+6mn+9n^2)
5.50m^2-32n^2
=2(25m^2-16n^2)
=2(5m+4n)(5m-4n)
6.x^2-4y^2-6x+9
=(x^2-6x+9)-4y^2
=(x-3)^2-(2y)^2
=(x+2y-3)(x-2y-3)
1.(因式分解)m*m/9-mn/3+n*n/4.2.已知x*x+y*y-2x+1=0,求xy=________.
xy(m方+n方)-mn(x方+y方)因式分解
因式分解:mn(x²+y²)+xy(m²+n²)
因式分解mn(x^2+y^2)+xy(m^2+n^2)
把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x
10道因式分解1.-7m(m-n)^3+21mn(n-m)^22.5x(x-2y)^2-10y(2y-x)^23.225
1.因式分解(1) 1-4x²y²(2) 16m²+25n²+40mn(3) 2
因式分解x^3-4x^2y x^3+2x^2+x和分解因式4a^2-1 m^2+n^2+2mn-p^2
因式分解:(1)18(m+n)²-2(m-n)² (2)2y-3x-9x²+4y²
若X的m+n-1的次方+2y的2m+3n-4=3是关于xy的二元一次方程,那么mn=
已知多项式2x2+xy-3y2-x-4y-1=(2x+3y+m)(x-y+n),求m、n的值.
(x+y)(5m+3m)的平方-(x+y)(m-n)的平方 因式分解