Toán Lớp 9: √3+2√2
√4-2√3
mn giúp mik với ạ
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Toán Lớp 9: √3+2√2
√4-2√3
mn giúp mik với ạ
Comments ( 2 )
$=\sqrt[]{1+2.1.\sqrt[]{2}+2}$
$=\sqrt[]{1+2.1.\sqrt[]{2}+2}$
$=\sqrt[]{(1+\sqrt[]{2})^2}$
$=1+\sqrt[]{2}$
$=\sqrt[]{1-2.1.\sqrt[]{3}+3}$
$=\sqrt[]{(1-\sqrt[]{3})^2}$
$=\sqrt[]{3}-1$