(根号48+根号27-根号12)/(根号2+根号3)
=(4√3+3√3-2√3)/(√2+√3)
=(5√3)/(√2+√3)
=(5√3)(√2-√3)/(√2+√3)(√2-√3)
=(5√6-15)/(2-3)
=(5√6-15)/(-1)
=15-5√6
解
原式
=(4√3+3√3-2√3)/(√2+√3)
=(5√3)(√2-√3)/(√2+√3)(√2-√3)
=(5√6-15)/(2-3)
=-(5√6-15)
=15-5√6
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