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

Toán Lớp 9: -căn x+3=15 giải nhanh giúp mình nha, mình cấn gấp.

Toán Lớp 9: -căn x+3=15 giải nhanh giúp mình nha, mình cấn gấp.

Comments ( 2 )

  1. \text{# Xà Phòng}
    -$\sqrt{x-3}$  = 15 
    ⇔ -($\sqrt{x-3}$ )² = 15
    ⇔ – x+ 3 =225 
    ⇔-  x = 222 
    ⇔ x= -222 

  2. $\text{-$\sqrt{x-3}$=15}$
    $\text{⇔-($\sqrt{x-3}$)²=15²}$
    $\text{⇔-x+3=225}$
    $\text{⇔-x=222}$
    $\text{⇔x=-222}$
     

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

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