2t²+3t²-(3t²+5t-t²)

来源：学生学帮网 编辑：学帮网 时间：2024/06/17 19:54:38

2t²+3t²-(3t²+5t-t²)

2t²+3t²-(3t²+5t-t²)
=2t²+3t²-3t²-5t+t²
=3t²-5t

2t²+3t²-(3t²+5t-t²)=5t²-（2t²+5t)=5t²-2t²-5t=3t²-5t