化简-(2a²+5)-(3a²-2)-2(-4a²-1)

问题描述:

化简-(2a²+5)-(3a²-2)-2(-4a²-1)

-(2a²+5)-(3a²-2)-2(-4a²-1)
=-5a²-3+8a²+2
=3a²-1

-(2a²+5)-(3a²-2)-2(-4a²-1)
=-2a²-5-3a²+8a²+2
=3a²-3