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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: giá trị biểu thức $\frac{√162}{√2}$ bằng

Toán Lớp 9: giá trị biểu thức $\frac{√162}{√2}$ bằng

Comments ( 2 )

  1. (\sqrt{162})/(\sqrt{2})
    =\sqrt{162/2}
    =\sqrt{(162:2)/(2:2)}
    =\sqrt{81/1}
    =\sqrt{81}
    =\sqrt{9^2}
    =|9|
    =9
     

  2. $\dfrac{\sqrt{162}}{\sqrt{2}}$
    $=\sqrt{\dfrac{162}{2}}$
    $=\sqrt{81}$
    $=\sqrt{9^2}$
    $=9$
     

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222-9+11+12:2*14+14 = ? ( )