根号2(2-根号2)-根号8 根号2(2-根号2)-根号8 (根号2+1)^2-(根号2-1)^2 (2倍根号54-3倍根号21+4倍根号15)*根号3

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根号2(2-根号2)-根号8 根号2(2-根号2)-根号8 (根号2+1)^2-(根号2-1)^2 (2倍根号54-3倍根号21+4倍根号15)*根号3

根号2(2-根号2)-根号8 根号2(2-根号2)-根号8 (根号2+1)^2-(根号2-1)^2 (2倍根号54-3倍根号21+4倍根号15)*根号3
根号2(2-根号2)-根号8
根号2(2-根号2)-根号8 (根号2+1)^2-(根号2-1)^2 (2倍根号54-3倍根号21+4倍根号15)*根号3

根号2(2-根号2)-根号8 根号2(2-根号2)-根号8 (根号2+1)^2-(根号2-1)^2 (2倍根号54-3倍根号21+4倍根号15)*根号3
根号2(2-根号2)-根号8=2根号2--2-2根号2 =-2
(根号2+1)^2-(根号2-1)^2 =2+1+2根号2-2+2根号2 -1=4根号2
(2倍根号54-3倍根号21+4倍根号15)*根号3=(3倍根号6-3倍根号21+4倍根号15)*根号3=9根号3-9根号7+12根号5