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

Toán Lớp 8: ptdttnt 3x^2 – 3y^2 – 12x +12y

Toán Lớp 8: ptdttnt
3x^2 – 3y^2 – 12x +12y

Comments ( 2 )

  1. $3x^2$ $-$ $3y^2$ $-$ $12x$ $+$ $12y$
    $=$ $3(x^2-y^2-4x+4y)$
    $=$ $3[(x-y)(x+y)-4(x-y)]$
    $=$ $3(x-y)(x+y-4)$
    $Chúc$ $bạn$ $học$ $tốt!$
     

  2. Giải đáp+Lời giải và giải thích chi tiết:
    3x^2 – 3y^2 – 12x +12y
    = 3(x^2-y^2) – 12(x-y)
    = 3(x+y)(x-y)-12(x-y)
    =3(x-y)(x+y-4)

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

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