1.x(x-y)-(x-3)(x+3) 2.(a^2+b^2)(a+b)(a-b) 3.(a-2b+3c)(a+2b-3c) 4.(x+y-z)(x-y+z) 5.(x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 21:22:42
![1.x(x-y)-(x-3)(x+3) 2.(a^2+b^2)(a+b)(a-b) 3.(a-2b+3c)(a+2b-3c) 4.(x+y-z)(x-y+z) 5.(x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)](/uploads/image/z/6696780-60-0.jpg?t=1.x%28x-y%29-%28x-3%29%28x%2B3%29+2.%EF%BC%88a%5E2%2Bb%5E2%29%28a%2Bb%29%28a-b%29+3.%28a-2b%2B3c%29%28a%2B2b-3c%29+4.%28x%2By-z%29%28x-y%2Bz%29+5.%28x%5E8%2By%5E8%29%28x%5E4%2By%5E4%29%28x%5E2%2By%5E2%29%28x%2By%29%28x-y%29)
1.x(x-y)-(x-3)(x+3) 2.(a^2+b^2)(a+b)(a-b) 3.(a-2b+3c)(a+2b-3c) 4.(x+y-z)(x-y+z) 5.(x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)
1.x(x-y)-(x-3)(x+3) 2.(a^2+b^2)(a+b)(a-b) 3.(a-2b+3c)(a+2b-3c) 4.(x+y-z)(x-y+z) 5.(x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)
1.x(x-y)-(x-3)(x+3) 2.(a^2+b^2)(a+b)(a-b) 3.(a-2b+3c)(a+2b-3c) 4.(x+y-z)(x-y+z) 5.(x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)
1、=X^2-XY-X^2+9
=9-XY
2, =(a^2+b^2)(a^2-b^2)
=a^4-b^4
3,=[a-(2b-3c)][a+(2b-3c)]
=a^2-(2b-3c)^2
=a^2-4b^2-9c^2+12bc
4.=[x+(y-z)][x-(y-z)]
=x^2-(y-z)^2
=...
全部展开
1、=X^2-XY-X^2+9
=9-XY
2, =(a^2+b^2)(a^2-b^2)
=a^4-b^4
3,=[a-(2b-3c)][a+(2b-3c)]
=a^2-(2b-3c)^2
=a^2-4b^2-9c^2+12bc
4.=[x+(y-z)][x-(y-z)]
=x^2-(y-z)^2
=x^2-y^2-z^2+2yz
5.=(x^8+y^8)(x^4+y^4)(x^2+y^2)(x^2-y^2)
=(x^8+y^8)(x^4+y^4)(x^4-y^4)
=(x^8+y^8)(x^8-y^8)
=x^16-y^16
收起