x＞3,化简根号x²-6x+9+根号x²+2x+1
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x＞3,化简根号x²-6x+9+根号x²+2x+1x＞3,化简根号x²-6x+9+根号x²+2x+1x＞3,化简根号x²-6x+9+根号x²
x＞3,化简根号x²-6x+9+根号x²+2x+1
x＞3,化简根号x²-6x+9+根号x²+2x+1
x＞3,化简根号x²-6x+9+根号x²+2x+1
根号x²-6x+9+根号x²+2x+1
=根号(x-3)²+根号(x+1)²
=x-3+x+1
=2x-2