(-t³+3t²-5t+7)+(5t²-7t)-(t³-t+3) 帮我看看.最好

来源：学生作业帮编辑：拍题作业网作业帮分类：数学作业时间：2024/05/05 18:09:55

(-t³+3t²-5t+7)+(5t²-7t)-(t³-t+3) 帮我看看.最好写过程.

(-t³+3t²-5t+7)+(5t²-7t)-(t³-t+3)
=-t³+3t²-5t+7+5t²-7t-t³+t-3
=-2t³+8t²-11t+4

(-t³+3t²-5t+7)+(5t²-7t)-(t³-t+3) 帮我看看.最好 2t²+3t²-(3t²+5t-t²) -t·(-t)²-t³ t$ ,t T “T (t+3t²-3)-(-t+4t²）参考身高: 2T 3T 4T 5T 6T 8T是什么意思 T^T 3t²-4t-5=0 解方程 2t³+3t²+3t+1