(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)

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(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)[3√5-4√2][2√5+3√2]=30+

(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)
(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)

(3倍根号5-4倍根号2)(2倍根号5+3倍根号2)
[3√5-4√2][2√5+3√2]=30+9√10-8√10-24=6+√10