计算(5a²-3b)－3(a²-2b)的结果是

计算(5a²-3b)－3(a²-2b)的结果是
计算(5a²-3b)－3(a²-2b)的结果是

计算(5a²-3b)－3(a²-2b)的结果是
2a的平方+3b

2a×a+3b

5a "_3 b- 3a" + 6 b=2a "+ 3b