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

Toán Lớp 8: `a,` `6x²y + 3xy²` `b,` `3x ( 2x -3 ) – 4 ( 3 – 2x )`

Toán Lớp 8: a, 6x²y + 3xy² b, 3x ( 2x -3 ) – 4 ( 3 – 2x )

Comments ( 2 )

  1. Giải đáp:
     $\begin{array}{l} a, \quad 3xy(2x+y) \\ b,\quad(3x+4)(2x-3) \end{array}$
    Lời giải và giải thích chi tiết:
    $\begin{array}{l} 6x^2y +3xy^2 \\ = 3xy(2x+y)  \\ \\ 3x(2x-3) -4(3-2x) \\ = 3x(2x-3) + 4(2x-3) \\ = (3x+4)(2x-3)  \\ \end{array}$

  2. Giải đáp:
     $a) 6x²y+3xy²$
    $= 3xy.2x+3xy.y$
    $= 3xy.(2x+y)$
    $b) 3x.(2x-3)-4.(3-2x)$
    $= 3x.(2x-3)+4.(2x-3)$
    $= (3x+4).(2x-3)$
     

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