问题补充说明：6.5^2-13×3.5+3.5^2
6.5^2石老提烧想飞律-13*3.5+3.5^清流乎民商背化写2
=6.5^2-2*6.5*3.5+3.5^2
=(6.5-3.5)^2
=3^2=9
6.5^来自2-13×3.5+3.5^2
Simone
发布于 2024-08-30 14:07:44
614 阅读
Simone
发布于 2024-08-30 14:07:44
614 阅读
