因式分解【a²+4²】-16a²
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因式分解【a²+4²】-16a²
![因式分解【a²+4²】-16a²](/uploads/image/z/2466646-70-6.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E3%80%90a%26%23178%3B%2B4%26%23178%3B%E3%80%91-16a%26%23178%3B)
题目写错了吧,根据经验,应该是
( a" + 4 )" - 16a"
= ( a" + 4 )" - ( 4a )"
= ( a" - 4a + 4 )( a" + 4a + 4 )
= ( a - 2 )"( a + 2 )"
( a" + 4 )" - 16a"
= ( a" + 4 )" - ( 4a )"
= ( a" - 4a + 4 )( a" + 4a + 4 )
= ( a - 2 )"( a + 2 )"