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

Toán Lớp 9: Tính a/ √0,52 b/ √(√3−2)2 c/ √(5−√20)2

Toán Lớp 9: Tính
a/ √0,52
b/ √(√3−2)2
c/ √(5−√20)2

Comments ( 2 )

  1. $a.\sqrt[]{0,5^2}$
    $=|0,5|^{}$
    $=0,5^{}$
    $b.\sqrt[]{(\sqrt[]{3}-2)^2}$
    $=|\sqrt[]{3}-2|$
    $=2-\sqrt[]{3}$
    $c.\sqrt[]{(5-\sqrt[]{20})^2}$
    $=|5-\sqrt[]{20}|$
    $=5-\sqrt[]{20}$
    Chúc bạn học tốt !!!!

  2. a) \sqrt{(0,5)^2}
    =|0,5|
    =0,5
    b) \sqrt{(\sqrt{3}-2)^2}
    =|\sqrt{3}-2|
    =-(\sqrt{3}-2)
    =2-\sqrt{3}
    c) \sqrt{(5-\sqrt{20})^2}
    =|5-\sqrt{20}|
    =5-\sqrt{20}
     

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