当x>3时,化简(3-x)根号2x/9-6x+x²

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当x>3时,化简(3-x)根号2x/9-6x+x²

(3-x)√2x/9-6x+x²
=(3-x)√2x/(3-x)²
=(3-x)/(x-3)√2x
=-√2x