代数式㎡十3m一3二9则代数式3㎡十9m一2的值是多少

代数式㎡十3m一3二9则代数式3㎡十9m一2的值是多少
2025-05-10 23:26:35
推荐回答(1个)
回答1:

3㎡十9m一2
=3㎡十9m一9+9-2
=3(m²+3m-3)+7
=3x9+7
=27+7
=34