几道因式分解和计算(1)4x^4-9y^4(2)(a+3)(a-7)+25下面是计算(1)(3x+1)(3x-1)^2(2)(x+1)(x^2+1)(x-1)谢谢了=V=

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 06:07:08
几道因式分解和计算(1)4x^4-9y^4(2)(a+3)(a-7)+25下面是计算(1)(3x+1)(3x-1)^2(2)(x+1)(x^2+1)(x-1)谢谢了=V=几道因式分解和计算(1)4x^

几道因式分解和计算(1)4x^4-9y^4(2)(a+3)(a-7)+25下面是计算(1)(3x+1)(3x-1)^2(2)(x+1)(x^2+1)(x-1)谢谢了=V=
几道因式分解和计算
(1)4x^4-9y^4
(2)(a+3)(a-7)+25
下面是计算
(1)(3x+1)(3x-1)^2
(2)(x+1)(x^2+1)(x-1)
谢谢了=V=

几道因式分解和计算(1)4x^4-9y^4(2)(a+3)(a-7)+25下面是计算(1)(3x+1)(3x-1)^2(2)(x+1)(x^2+1)(x-1)谢谢了=V=
(1)4x^4-9y^4
=(2x+3y)(2x-3y)
(2)(a+3)(a-7)+25
=a^2-4a+4
=(a-2)^2
计算:
(1)(3x+1)(3x-1)^2
=(9x^2-1)(3x-1)
=27x^3-9x^2-3x+1
(2)(x+1)(x^2+1)(x-1)
=(x^2-1)(x^2+1)
=x^4-1