Toán Lớp 8: b, (√3 – √2)^2 ; (3√2-1)(3√2+1) ; (√6+2)(√3-√2)
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Toán Lớp 8: b, (√3 – √2)^2 ; (3√2-1)(3√2+1) ; (√6+2)(√3-√2)
Comments ( 2 )
$(\sqrt{3}-\sqrt{2})^2$
$=3-2\sqrt{6}+2$
$=5-2\sqrt{6}$
$=18-1$
$=17$
———————–
$=\sqrt{2}(\sqrt{3}+\sqrt{2})(\sqrt{3}-\sqrt{2})$
$=\sqrt{2}(3-2)$
$=\sqrt{2}.1$
$=\sqrt{2}$