“微信扫一扫”进入题库练习及模拟考试
求下列各式的值:
参考答案:原式 \( = \sqrt {{{(\sqrt 3 )}^2} + 2\sqrt 6 + {{(\sqrt 2 )}^2}} + \sqrt {{{(\sqrt 3 )}^2} - 2\sqrt 6 + {{(\sqrt 2 )}^2}} \)\( = \sqrt {{{(\sqrt 3 + \sqrt 2 )}^2}} + \sqrt {{{(\sqrt 3 - \sqrt 2 )}^2}} = |\sqrt 3 + \sqrt 2 | + |\sqrt 3 - \sqrt 2 |\)\( = \sqrt 3 + \sqrt 2 + \sqrt 3 - \sqrt 2 = 2\sqrt 3 \).