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

Toán Lớp 8: bài 1 tìm x a, (x +1 ) (x-4) . x^2 =0 giúp với ạ

Toán Lớp 8: bài 1 tìm x
a, (x +1 ) (x-4) . x^2 =0
giúp với ạ

Comments ( 2 )

  1. (x+1)(x-4).x^2=0
    =>\(\left[ \begin{array}{l}x+1=0\\x-4=0\\x^2=0\end{array} \right.\) 
    =>\(\left[ \begin{array}{l}x=-1\\x=4\\x=0\end{array} \right.\) 
    Vậy x={-1;0;4}.

  2. (x+1)(x-4).x^2=0
    ⇔x=0
    x+1=0⇔x=-1
    x-4=0⇔x=4
    Vậy x={0,-1,4}

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