(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 13:14:03
![(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?](/uploads/image/z/3008220-60-0.jpg?t=%EF%BC%88t%2B3t%26%23178%3B-3%EF%BC%89-%EF%BC%88-t%2B4t%26%23178%3B%EF%BC%89%2C%E5%85%B6%E4%B8%ADt%3D-1%2C%E6%80%8E%E4%B9%88%E5%8C%96%E7%AE%80%2C%E6%80%8E%E4%B9%88%E6%B1%82%E5%80%BC%3F)
(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?
(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?
(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?
(t+3t²-3)-(-t+4t²)
当T=-1时
(-1+3(-1)²-3)-(-(-1)+4(-1)²)
=(-1+3-3)-(1+4)
=-1-5
=-6