5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}的值a,b其
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5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}的值a,b其中满足丨a-2丨+3(b+1)²=0
![5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}的值a,b其](/uploads/image/z/20270373-69-3.jpg?t=5ab%26%23178%3B-%E4%B8%A82a%26%23178%3Bb-%7B3ab%26%23178%3B-%EF%BC%884ab%26%23178%3B-2ab%26%23178%3B%EF%BC%89%7D%E7%9A%84%E5%80%BCa%2Cb%E5%85%B6)
丨a-2丨+3(b+1)²=0
所以a-2=0,b+1=0
a=2,b=-1
5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}|
=5ab²-2a²b+{3ab²-(4ab²-2ab²)}
=5ab²-2a²b+3ab²-(4ab²-2ab²)
=8ab²-2a²b-4ab²+2ab²
=4ab²
=4*2*(-1)²
=8
再问: 确定对吧?
再答: 确定
所以a-2=0,b+1=0
a=2,b=-1
5ab²-丨2a²b-{3ab²-(4ab²-2ab²)}|
=5ab²-2a²b+{3ab²-(4ab²-2ab²)}
=5ab²-2a²b+3ab²-(4ab²-2ab²)
=8ab²-2a²b-4ab²+2ab²
=4ab²
=4*2*(-1)²
=8
再问: 确定对吧?
再答: 确定
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