根号2(根号6-根号3-根号2+1)/根号(3-2根号2)×根号(2-根号3)
1个回答
2012-09-01
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解:先化简√(3-2√2)=√[(√2-1)²]=√2-1
则原式=√2(√6-√3-√2+1)÷[(√2-1)√(2-√3)]
=√2(√6-√3-√2+1)(√2+1)÷[(√2-1)(√2+1)(√(2-√3)]
=…………(中间的化简我就不写啦,手有点痛)
=(√6-√2)÷√(2-√3)
=(√6-√2)√(2+√3)÷[√(2-√3)√(2+√3)]
=(√6-√2)√(2+√3)
=(√6-√2)(√6+√2)/2
=2
则原式=√2(√6-√3-√2+1)÷[(√2-1)√(2-√3)]
=√2(√6-√3-√2+1)(√2+1)÷[(√2-1)(√2+1)(√(2-√3)]
=…………(中间的化简我就不写啦,手有点痛)
=(√6-√2)÷√(2-√3)
=(√6-√2)√(2+√3)÷[√(2-√3)√(2+√3)]
=(√6-√2)√(2+√3)
=(√6-√2)(√6+√2)/2
=2
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