Đáp án:
$\sqrt{3 + \sqrt{8}} = \sqrt{3 + 2\sqrt{2}} = \sqrt{(\sqrt{2} + 1)^2} = \sqrt{2} + 1$
Giải thích các bước giải:
n,
$\sqrt{3+\sqrt{8}}$
$=\sqrt{3+2\sqrt{2}}$
$=\sqrt{(\sqrt{2})^2+2\sqrt{2}+1}$
$=\sqrt{(\sqrt{2}+1)^2}$
$=|\sqrt{2}+1|$
$=\sqrt{2}+1$
Em hãy kể những triệu chứng mụn trứng cá mùa hè (Acne aestivalis)
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