因式分解:(a+2)(a-3(a²-7)+(2+a)(3-a)(a+3)
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因式分解:(a+2)(a-3(a²-7)+(2+a)(3-a)(a+3)
![因式分解:(a+2)(a-3(a²-7)+(2+a)(3-a)(a+3)](/uploads/image/z/18794563-43-3.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%3A%28a%2B2%29%28a-3%28a%26%23178%3B-7%29%2B%282%2Ba%29%283-a%29%28a%2B3%29)
(a+2)(a-3)(a²-7)+(2+a)(3-a)(a+3)
=(a+2) (a-3) ( a²-7 -a-3)
=(a+2) (a-3) ( a² - a-10)
再问: 这我看不懂,能简单点吗
再答: (a+2)(a-3)(a²-7)+(2+a)(3-a)(a+3) =(a+2)(a-3)(a²-7)-(a+2)(a-3)(a+3) =(a+2) (a-3) [ a²-7 - (a+3)] =(a+2) (a-3) ( a² - a-10)
=(a+2) (a-3) ( a²-7 -a-3)
=(a+2) (a-3) ( a² - a-10)
再问: 这我看不懂,能简单点吗
再答: (a+2)(a-3)(a²-7)+(2+a)(3-a)(a+3) =(a+2)(a-3)(a²-7)-(a+2)(a-3)(a+3) =(a+2) (a-3) [ a²-7 - (a+3)] =(a+2) (a-3) ( a² - a-10)