(2根号3-4根号2)(根号6-根号2)怎么做啊

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(2根号3-4根号2)(根号6-根号2)怎么做啊
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(2根号3-4根号2)(根号6-根号2)怎么做啊
(2根号3-4根号2)(根号6-根号2)怎么做啊

(2根号3-4根号2)(根号6-根号2)怎么做啊
(2√3-4√2)(√6-√2)
=2√3(√6-√2)-4√2(√6-√2)
=6√2-2√6-8√3+8