Đáp án+Giải thích các bước giải:
$\sqrt{\dfrac{169}{64}}$ `=13/8`
$\dfrac{\sqrt{169}}{\sqrt{64}}$ `=13/8`
Vì `13=13` nên `13/8=13/8`
`=>` $\sqrt{\dfrac{169}{64}} = \dfrac{\sqrt{169}}{\sqrt{64}}$
$\\$
$\sqrt{\dfrac{2,25}{2,26}}$ `=` $\dfrac{1,5}{\dfrac{\sqrt{226}}{10}}$
$\dfrac{\sqrt{2,25}}{\sqrt{2,26}}$ `=` $\dfrac{1,5}{\dfrac{\sqrt{226}}{10}}$
Vì `1,5=1,5` nên $\dfrac{1,5}{\dfrac{\sqrt{226}}{10}}$ `=` $\dfrac{1,5}{\dfrac{\sqrt{226}}{10}}$
`=>` $\sqrt{\dfrac{2,25}{2,26}}$ `=` $\dfrac{\sqrt{2,25}}{\sqrt{2,26}}$
$@Maruko-chan$ ;-;
