4(a+2)^2-7(a+3)(a-3)+3(a-1)^2

2025-02-23 06:47:47
推荐回答(1个)
回答1:

=4(a²+4a+4)-7(a²-9)+3(a²-2a+1)
=4a²+16a+16-7a²+63+3a²-6a+3
=10a+82