求整式3x²-[7x-(4x-3)-2x²]的计算

问题描述:

求整式3x²-[7x-(4x-3)-2x²]的计算

3x²-[7x-(4x-3)-2x²]
=3x²-[7x-4x+3-2x²]
=3x²-7x+4x-3+2x²
=5x²-3x-3
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