3a²-2[2a²-(2ab-a²)+4ab]=()10+3(1+n²)-2(1-n+n²)+2(1-n+n²-n³)=()
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 15:39:17
![3a²-2[2a²-(2ab-a²)+4ab]=()10+3(1+n²)-2(1-n+n²)+2(1-n+n²-n³)=()](/uploads/image/z/7942594-58-4.jpg?t=3a%26%23178%3B-2%5B2a%26%23178%3B-%EF%BC%882ab-a%26%23178%3B%EF%BC%89%2B4ab%5D%3D%EF%BC%88%EF%BC%8910%2B3%EF%BC%881%2Bn%26%23178%3B%EF%BC%89-2%EF%BC%881-n%2Bn%26%23178%3B%EF%BC%89%2B2%EF%BC%881-n%2Bn%26%23178%3B-n%26%23179%3B%EF%BC%89%3D%EF%BC%88%EF%BC%89)
3a²-2[2a²-(2ab-a²)+4ab]=()10+3(1+n²)-2(1-n+n²)+2(1-n+n²-n³)=()
3a²-2[2a²-(2ab-a²)+4ab]=()
10+3(1+n²)-2(1-n+n²)+2(1-n+n²-n³)=()
3a²-2[2a²-(2ab-a²)+4ab]=()10+3(1+n²)-2(1-n+n²)+2(1-n+n²-n³)=()
3a²-2[2a²-(2ab-a²)+4ab]
=3a²-4a²+4ab-2a²-8ab
=-3a²-4ab
10+3(1+n²)-2(1-n+n²)+2(1-n+n²-n³)
=10+3+3n²-2+2n-2n²+2-2n+2n²-2n³
=13+3n²-2n³