(根号2+根号3-根号6)(根号2-根号3-根号6)=

来源:百度知道 编辑:UC知道 时间:2024/06/24 05:43:05

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=r2*r2-r2*r3-r2*r6+r3*r2-r3*r3-r3*r6-r6*r2+r6*r3+r6*r6
=2-3+6-2*r2*r6=5-2*r12=5-4r3

(r2表示根号2)

(根号2+根号3-根号6)(根号2-根号3-根号6)=
根号2x根号2-根号2x根号3-根号2x根号6+根号3x根号2-根号3x根号3-根号3x根号6-根号6x根号2+根号6x根号3+根号6x根号6 =
2-根号6-根号12+根号6-3-根号18-根号12+根号18+6=
2-3+6-2倍根号12=
5-4倍根号3