原式=-2×2^10+2^10
=(-2+1)x2^10
=-2^10
=-1024=(-2+1)x2^101是哪来的？提出来的系数呀！原式=-2×2^10+2^10=-2×2^10+1*2^10=(-2+1)x2^10=-2^10=-1024
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