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

Toán Lớp 8: ax^2 – 3axy+bx-3by phân tích thành nhân tử

Toán Lớp 8: ax^2 – 3axy+bx-3by phân tích thành nhân tử

Comments ( 2 )

  1.    ax² – 3axy + bx – 3by 
    = (ax² + bx ) – (3axy + 3by)
    =x(ax + b) – 3y ( ax + b )
    = ( ax + b)(x – 3y )

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