5的8次方-1用因式分解
题目
5的8次方-1用因式分解
答案
5的8次方-1
=5^8-1
=(5^4)^2-1
=(5^4-1)(5^4+1)
=(5^2-1)(5^4+1)(5^2+1)
=(5-1)(5+1)(5^4+1)(5^2+1)
=4*6*626*26
=390624
举一反三
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