
计算(根号2+2倍根号3-根号6)(根号2-2倍根号3+根号6),要步骤.急急急!!!麻烦了!
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(根号2+2倍根号3-根号6)(根号2-2倍根号3+根号6)
=[根号2+(2倍根号3-根号6)]*[根号2-(2倍根号3-根号6)]
=(根号2)²-(2倍根号3-根号6)²
=2- 3(2-根号2)²
=2-3(6-4根号2)
=2-18+12根号2
=-16+12根号2
=[根号2+(2倍根号3-根号6)]*[根号2-(2倍根号3-根号6)]
=(根号2)²-(2倍根号3-根号6)²
=2- 3(2-根号2)²
=2-3(6-4根号2)
=2-18+12根号2
=-16+12根号2
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