若(a+2)(a-2)=a²-2k,则k=?
问题描述:
若(a+2)(a-2)=a²-2k,则k=?
答
(a+2)(a-2)
=a^2-4
=a²-2k
k=2
若(a+2)(a-2)=a²-2k,则k=?
(a+2)(a-2)
=a^2-4
=a²-2k
k=2