(4a+2b-1)²-(4a-2b+1)²
问题描述:
(4a+2b-1)²-(4a-2b+1)²
答
原式=[(4a+2b-1)+(4a-2b+1)] [(4a+2b-1)-(4a-2b+1)]
=(4a+2b-1+4a-2b+1)(4a+2b-1-4a+2b-1)
=8a(4b-2)
=16a(2b-1)