作业帮（4a²-3b²）-[2(a²-1）+2b²-3]
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 11:49:15
![（4a²-3b²）-[2(a²-1）+2b²-3]](/uploads/image/z/5176092-12-2.jpg?t=%EF%BC%884a%26%23178%3B-3b%26%23178%3B%EF%BC%89-%5B2%28a%26%23178%3B-1%EF%BC%89%2B2b%26%23178%3B-3%5D)
（4a²-3b²）-[2(a²-1）+2b²-3]
（4a²-3b²）-[2(a²-1）+2b²-3]
（4a²-3b²）-[2(a²-1）+2b²-3]
（4a²-3b²）-[2(a²-1）+2b²-3]
=4a²-3b²-(2a²-2+2b²-3)
=4a²-3b²-(2a²+2b²-5)
=4a²-3b²-2a²-2b²+5
=(4a²-2a²)+(-3b²-2b²)+5
=2a²-5b²+5
（4a²-3b²）-[2(a²-1）+2b²-3]
=4a²-3b²-2(a²-1）-2b²+3
=4a²-3b²-2a²+2-2b²+3
=2a²-5b²+5