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

Toán Lớp 8: 12x^2z+12xz+3z=-..

Toán Lớp 8: 12x^2z+12xz+3z………………

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     $12x^{2}z+12xz+3z$
    $=3z(4x^{2}+4x+1)$
    $=3z.(2x+1)^{2}$

  2. 12x^2z+12xz+3z
    =12x^2z+6xz+6xz+3z
    =6xz.(2x+1)+3z.(2x+1)
    =(2x+1)(6xz+3z)
    =3z.(2x+1)(2x+1)
    =3z.(2x+1)^2

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

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