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

Toán Lớp 7: 3X(X-2/5)=0 mong mọi người giúp mik

Toán Lớp 7: 3X(X-2/5)=0 mong mọi người giúp mik

Comments ( 2 )

  1. # Z E N
     3x(x-2/5)=0
    +)3x=0
    x=0:3
    x=0
    +)(x-2/5)=0
    x=0+2/5
    x=2/5
    Vậy x=0 hoặc x=2/5
     

  2. $\\$
    3x (x-2/5)=0
    -> \(\left[ \begin{array}{l}3x=0\\x-\dfrac{2}{5}=0\end{array} \right.\) $\\$ -> \(\left[ \begin{array}{l}x=0:3\\x=0+\dfrac{2}{5}\end{array} \right.\) $\\$ -> \(\left[ \begin{array}{l}x=0\\x=\dfrac{2}{5}\end{array} \right.\) 
    Vậy x=0 hoặc x=2/5
     

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

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