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

Toán Lớp 8: (X-3)(x-4)=? Làm giúp mình với ạ

Toán Lớp 8: (X-3)(x-4)=?
Làm giúp mình với ạ

Comments ( 2 )

  1. (x – 3)(x – 4)
    = x^{2} – 4x – 3x + 12
    = x^{2} – 7x + 12
     

  2. (x-3)(x-4)
    =x(x-4)-3(x-4)
    =x^2-4x-3x+12
    =x^2-7x+12

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

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