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

Toán Lớp 10: (x+1) ² – 3|x +1|+2=0 GIÚP MÌNH VỚI Ạ!!!!

Toán Lớp 10: (x+1) ² – 3|x +1|+2=0
GIÚP MÌNH VỚI Ạ!!!!

Comments ( 1 )

  1. Giải đáp:
    $\left[\begin{array}{l} x=1\\x=-3\\x =0\\x  =-2\end{array} \right..$
    Lời giải và giải thích chi tiết:
    $(x+1)^2 – 3|x +1|+2=0\\ \Leftrightarrow |x+1|^2 – 3|x +1|+2=0\\ \Leftrightarrow |x+1|^2 – |x +1|-2 |x +1|+2=0\\ \Leftrightarrow |x+1|(|x +1| – 1)-2 (|x +1|-1)=0\\ \Leftrightarrow (|x+1|-2) (|x +1| – 1)=0\\ \Leftrightarrow \left[\begin{array}{l} |x+1|-2=0\\|x +1| – 1=0\end{array} \right.\\ \Leftrightarrow \left[\begin{array}{l} |x+1|=2\\|x +1| =1\end{array} \right.\\ \Leftrightarrow \left[\begin{array}{l} x+1=2\\x+1=-2\\x +1 =1\\x +1 =-1\end{array} \right.\\ \Leftrightarrow \left[\begin{array}{l} x=1\\x=-3\\x =0\\x  =-2\end{array} \right..$

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

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