来自蒋易的问题
去括号:-2a2-[3a2-(a-2)]=______.
去括号:-2a2-[3a2-(a-2)]=______.
1回答
2019-12-26 23:16
去括号:-2a2-[3a2-(a-2)]=______.
去括号:-2a2-[3a2-(a-2)]=______.
-2a2-[3a2-(a-2)]=-2a2-[3a2-a+2]=-2a2-3a2+a-2=-5a2+a-2,
故答案为-5a2+a-2.