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

Toán Lớp 8: `(4x+2)(4x-2)` nhanh với em ngu toán

Toán Lớp 8: (4x+2)(4x-2)
nhanh với em ngu toán

Comments ( 2 )

  1. Bạn kham khảo
    (4x+2)(4x-2)
    =(4x)^2-2^2
    =16x-4 

  2. (4x+2)(4x-2)
    =(4x)^2-2^2
    =16x^2-4
    * a^2-b^2=(a-b)(a+b)
     

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