:3x²-[5x-(1/2x-3)+2x²]

问题描述:

:3x²-[5x-(1/2x-3)+2x²]
1个回答 分类:数学 2014-10-25

问题解答:

我来补答
3x²-[5x-(1/2x-3)+2x²]
=3x²-[5x-1/2x+3+2x²]
=3x²-[9/2x+3+2x²]
=3x²-9/2x-3-2x²
=3x²-2x²-9/2x-3
=x²-9/2x-3
 
 
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