(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?
问题描述:
(t+3t²-3)-(-t+4t²),其中t=-1,怎么化简,怎么求值?
答
(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