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

Toán Lớp 8: Phân tích đa thức thành nhân tử 3(y-2)-(y-2)(8-4y)

Toán Lớp 8: Phân tích đa thức thành nhân tử

3(y-2)-(y-2)(8-4y)

Comments ( 2 )

  1.     3 ( y – 2 ) – ( y – 2 ) ( 8 – 4y )
    = 3 . ( y – 2 ) – ( y – 2 ) ( 8 – 4y )
    = ( y – 2 ) [ 3 – ( 8 – 4y ) ]
    = ( y – 2 ) [ 3 – 8 + 4y ]
    = ( y – 2 ) ( 4y + 3 – 8 )
    = ( y – 2 ) ( 4y – 5 )

  2. 3(y-2)-(y-2)(8-4y)
    <=>3.(y-2)-(y-2)(8-4y)
    <=> (y – 2)[3-(8-4y)]
    <=>(y – 2)[3-8+4y]
    <=>(y-2)(4y+3-8)
    <=>(y-2)(4y-5)
    @thew

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

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