-2a^2+3-(3a^2-6a+1)+3 a= -1
问题描述：
-2a^2+3-(3a^2-6a+1)+3 a= -1
答
原式
=-2a²+3-3a²+6a-1+3
=-2a²-3a²+6a-1+3+3
=-5a²+6a+5
=-5x1+6x(-1)+5
=-5-6+5
=-6
-2a^2+3-(3a^2-6a+1)+3 a= -1
原式
=-2a²+3-3a²+6a-1+3
=-2a²-3a²+6a-1+3+3
=-5a²+6a+5
=-5x1+6x(-1)+5
=-5-6+5
=-6