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

Toán Lớp 8: x^2 +x-12vphaan tích đa thức thành nhân tử

Toán Lớp 8: x^2 +x-12vphaan tích đa thức thành nhân tử

Comments ( 2 )

  1. x^2 + x -12
    = x^2 – 3x + 4x -12
    = x ( x – 3 ) + 4 ( x – 3 )
    = ( x + 4 ) ( x – 3 )
     

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

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