计算(5m+1)^2-(5m+1)(m-1)

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计算(5m+1)^2-(5m+1)(m-1)计算(5m+1)^2-(5m+1)(m-1)计算(5m+1)^2-(5m+1)(m-1)元素=25m²+10m+1-(5m²-5m+m-

计算(5m+1)^2-(5m+1)(m-1)
计算(5m+1)^2-(5m+1)(m-1)

计算(5m+1)^2-(5m+1)(m-1)
元素=25m²+10m+1-(5m²-5m+m-1)
=25m²+10m+1-5m²+4m+1
=20m²+14m+2

(5m+1)^2-(5m+1)(m-1)
=(5m+1)(5m+1-m+1)
=(5m+1)(4m+2)
=2(5m+1)(2m+1)

这个式子完整了?没等于几?

计算(5m+1)^2-(5m+1)(m-1)=(5m+1)(5m+1-m+1)=(5m+1)(4m+2)=20m²+19m+2