2次根式计算.(根号2+根号3-根号6)(根号2-根号3-根号6)
问题描述:
2次根式计算.(根号2+根号3-根号6)(根号2-根号3-根号6)
答
.(根号2+根号3-根号6)(根号2-根号3-根号6)
=[(√2-√6)+√3][(√2-√6)-√3]
=(√2-√6)²-(√3)²
=2-2×√2×√6+6-3
=5-4√3