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

Toán Lớp 8: Tìm x: (5x-3)(2x+1)(2x-1)^2+4=0

Toán Lớp 8: Tìm x:
(5x-3)(2x+1)(2x-1)^2+4=0

Comments ( 1 )

  1. $#Ben347$
    Giải đáp:
     (5x-3)(2x+1)-(2x-1)^2+4=0
    ⇔\(\left[ \begin{array}{l}x=0\\x=-1/2\end{array} \right.\) 
    Lời giải và giải thích chi tiết:
    ⇔10x^2-6x+5x-3-(4x^2-4x+1)+4=0
    ⇔ 10x^2-x-3-4x^2+4x-1+4=0
    ⇔6x^2+3x=0 ⇔ 3x(2x+1)=0
    ⇔\(\left[ \begin{array}{l}x=0\\x=-1/2\end{array} \right.\) 
     

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

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