3(1/3a-b)² (-a-2b)²

来源:学生作业帮助网 编辑:六六作业网 时间:2024/06/10 10:28:41
3(1/3a-b)²(-a-2b)²3(1/3a-b)²(-a-2b)²3(1/3a-b)²(-a-2b)²3(1/3a-b)²(

3(1/3a-b)² (-a-2b)²
3(1/3a-b)² (-a-2b)²

3(1/3a-b)² (-a-2b)²
3(1/3a-b)² (-a-2b)²
=3(a²/9-2ab/3+b²)
=a²/3-2ab+3b²
(-a-2b)²
=(a+2b)²
=a²+4ab+4b²