(m+2n+1)(m–2n–1)

(m+2n+1)(m–2n–1)
2025-06-27 21:33:24
推荐回答(1个)
回答1:

(m+2n+1)(m–2n–1)
=[m+(2n+1)][m-(2n+1)]
=m²-(2n+1)²
=m²-4n²-4n-1