(4a+2b-1)²(4a-2b+1)²=? 过程
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(4a+2b-1)²(4a-2b+1)²=? 过程
(4a+2b-1)²(4a-2b+1)²=? 过程
(4a+2b-1)²(4a-2b+1)²=? 过程
(4a+2b-1)²(4a-2b+1)²
=[(4a+2b-1)(4a-2b+1)]²
={[4a+ (2b-1)][4a-(2b-1)]}²
=(4a)²-(2b-1)²
=16a²-4b²+4b-1