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

Toán Lớp 8: 4x^2-8x=0 . Giúp mình gấp mn ơi

Toán Lớp 8: 4x^2-8x=0 . Giúp mình gấp mn ơi

Comments ( 2 )

  1. Gửi bạn:
    $4x^2-8x=0$
    $⇒4x(x-2)=0$
    $⇒\left[\begin{matrix} 4x=0\\ x-2=0\end{matrix}\right.$
    $⇒\left[\begin{matrix} x=0\\ x=2\end{matrix}\right.$
    $\text{ Vậy x=0 hoặc x=2}$
     

  2. 4x² – 8x = 0
    4x(x-2) = 0
    ⇒\(\left[ \begin{array}{l}4x=0\\x-2 = 0\end{array} \right.\) 
    ⇒ \(\left[ \begin{array}{l}x=0\\x= 2\end{array} \right.\) 
    Vậy \(\left[ \begin{array}{l}x=0\\x= 2\end{array} \right.\) 

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