先化简,再求值 4a²b-[3ab²-2﹙3a²b-1）],其中a=-0.1,b=1

题目

先化简,再求值 4a²b-[3ab²-2﹙3a²b-1）],其中a=-0.1,b=1

答案

4a²b-[3ab²-2﹙3a²b-1）]
=4a²b-(3ab²-6a²b+2)
=4a²b-3ab²+6a²b-2
=10a²b-3ab²-2
=10x0.01x1-3x(-0.1)x1-2
=0.1+0.3-2
=0.4-2
=-1.6
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