5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}的值a,b其中满足丨a-2丨+3(b+1)²=0

问题描述:

5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}的值a,b其中满足丨a-2丨+3(b+1)²=0