1、x^2y-6xy^2+9y^22、(y^2+4^2)-16y^23、(a-b)m^2+(b-a)n^24、x^3-2x[2分之1x^2-3)(6分之1x-1)-4分之1x]5、(a+1)^2-(1-a)(-a-1)6、[(2xy+3)(2xy-3)+(xy+3^2)]÷xy
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 14:05:49
![1、x^2y-6xy^2+9y^22、(y^2+4^2)-16y^23、(a-b)m^2+(b-a)n^24、x^3-2x[2分之1x^2-3)(6分之1x-1)-4分之1x]5、(a+1)^2-(1-a)(-a-1)6、[(2xy+3)(2xy-3)+(xy+3^2)]÷xy](/uploads/image/z/5253977-65-7.jpg?t=1%E3%80%81x%5E2y-6xy%5E2%2B9y%5E22%E3%80%81%EF%BC%88y%5E2%2B4%5E2%EF%BC%89-16y%5E23%E3%80%81%28a-b%29m%5E2%2B%28b-a%29n%5E24%E3%80%81x%5E3-2x%5B2%E5%88%86%E4%B9%8B1x%5E2-3%29%286%E5%88%86%E4%B9%8B1x-1%29-4%E5%88%86%E4%B9%8B1x%5D5%E3%80%81%28a%2B1%29%5E2-%281-a%29%28-a-1%296%E3%80%81%5B%282xy%2B3%29%282xy-3%29%2B%EF%BC%88xy%2B3%5E2%EF%BC%89%5D%C3%B7xy)
1、x^2y-6xy^2+9y^22、(y^2+4^2)-16y^23、(a-b)m^2+(b-a)n^24、x^3-2x[2分之1x^2-3)(6分之1x-1)-4分之1x]5、(a+1)^2-(1-a)(-a-1)6、[(2xy+3)(2xy-3)+(xy+3^2)]÷xy
1、x^2y-6xy^2+9y^2
2、(y^2+4^2)-16y^2
3、(a-b)m^2+(b-a)n^2
4、x^3-2x[2分之1x^2-3)(6分之1x-1)-4分之1x]
5、(a+1)^2-(1-a)(-a-1)
6、[(2xy+3)(2xy-3)+(xy+3^2)]÷xy
1、x^2y-6xy^2+9y^22、(y^2+4^2)-16y^23、(a-b)m^2+(b-a)n^24、x^3-2x[2分之1x^2-3)(6分之1x-1)-4分之1x]5、(a+1)^2-(1-a)(-a-1)6、[(2xy+3)(2xy-3)+(xy+3^2)]÷xy
1、x^2y-6xy^2+9y^2
=y(x²-6xy+9y)
2、(y^2+4)^2-16y^2
=(y²+4-4y)(y+4+4y)
=(y-2)²(y+2)²
3、(a-b)m^2+(b-a)n^2
=(a-b)m²-(a-b)n²
=(a-b)(m²-n²)
=(a-b)(m+n)(m-n)
4、x^3-2x[2分之1x^2-3)(6分之1x-1)-4分之1x]
看不太清楚
5、(a+1)^2-(1-a)(-a-1)
=(a+1)²-(a-1)(a+1)
=(a+1)(a+1-a+1)
=2(a+1)
6、[(2xy+3)(2xy-3)+(xy+3^2)]÷xy
=(4x²y²-9+xy+9)÷xy
=(4x²y²+xy)÷xy
=4xy+1
因式分解吗?好乱!