(2根号x-3根号y)2-(3根号x-2根号y)2
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![(2根号x-3根号y)2-(3根号x-2根号y)2](/uploads/image/z/10228038-6-8.jpg?t=%282%E6%A0%B9%E5%8F%B7x-3%E6%A0%B9%E5%8F%B7y%292-%283%E6%A0%B9%E5%8F%B7x-2%E6%A0%B9%E5%8F%B7y%292)
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(2根号x-3根号y)2-(3根号x-2根号y)2
(2根号x-3根号y)2-(3根号x-2根号y)2
(2根号x-3根号y)2-(3根号x-2根号y)2
=(2√x-3√y+3√x-2√y)(2√x-3√y-3√x+2√y)
=(5√x-5√y)(-√x-√y)
=-5(√x-√y)(√x+√y)
=-5(x-y)
=5y-5x
(2根x-3根y)²-(3根x-2根y)²=(2根x-3根y+3根x-2根y)(2根x-3根y-3根x+2根y)=-5(根x-根y)(根x+根y)=-5x+5y。。