2t²+3t²-(3t²+5t-t²)

来源：学生作业学帮网编辑：学帮网时间：2024/05/27 07:47:38

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