2(x+5)(x-4)-3(x-6)(x+1)=

其中x=2
2025-02-22 12:35:24
推荐回答(3个)
回答1:

=2(x² +x-20)-3(x² -5x-6)
=2x² +2x-40-3x² +15x+18
=-x² +17x-22
=-4+34-22
=8

回答2:

2(x+5)(x-4)-3(x-6)(x+1)=8

回答3:

12