(x²-7x)-(3x²-5-7x)化简(4ab-b²)-2(a²+2ab-b²)化简
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 15:08:00
![(x²-7x)-(3x²-5-7x)化简(4ab-b²)-2(a²+2ab-b²)化简](/uploads/image/z/1266765-69-5.jpg?t=%EF%BC%88x%26%23178%3B-7x%EF%BC%89-%EF%BC%883x%26%23178%3B-5-7x%EF%BC%89%E5%8C%96%E7%AE%80%EF%BC%884ab-b%26%23178%3B%EF%BC%89-2%EF%BC%88a%26%23178%3B%2B2ab-b%26%23178%3B%EF%BC%89%E5%8C%96%E7%AE%80)
(x²-7x)-(3x²-5-7x)化简(4ab-b²)-2(a²+2ab-b²)化简
(x²-7x)-(3x²-5-7x)化简
(4ab-b²)-2(a²+2ab-b²)化简
(x²-7x)-(3x²-5-7x)化简(4ab-b²)-2(a²+2ab-b²)化简
(x²-7x)-(3x²-5-7x)
=x²-7x-3x²+5+7x
=-2x²+5
(4ab-b²)-2(a²+2ab-b²)
=4ab-b²-2a²-4ab+2b²
=-2a²+b²