丨a-2丨+丨b+1丨=O,求5a²b-3ab²+2ab的值

来源：学生作业帮助网编辑：六六作业网时间：2024/11/25 09:02:24

丨a-2丨+丨b+1丨=O,求5a²b-3ab²+2ab的值丨a-2丨+丨b+1丨=O,求5a²b-3ab²+2ab的值丨a-2丨+丨b+1丨=O,求5a

丨a-2丨+丨b+1丨=O,求5a²b-3ab²+2ab的值
丨a-2丨+丨b+1丨=O,求5a²b-3ab²+2ab的值

丨a-2丨+丨b+1丨=O,求5a²b-3ab²+2ab的值
丨a-2丨+丨b+1丨=O,
a-2=0 b+1=0
a=2 b=-1
5a²b-3ab²+2ab的值
=5*2²*(-1)-3*2*(-1)²+2*2*(-1)
=-20-6-4
=-30