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

Toán Lớp 8: -4×(-2x^ 2+4x)_3×(2x^ 2_3x_4) rút gọn

Toán Lớp 8: -4×(-2x^ 2+4x)_3×(2x^ 2_3x_4) rút gọn

Comments ( 2 )

  1. -4(-2x^2+4x)-3(2x^2-3x-4)
    =8x^2-16x-6x^2+9x+12
    =(8x^2-6x^2)+(-16x+9x)+12
    =2x^2-7x+12
    #owen
     

  2. -4(-2x² + 4x) – 3(2x² – 3x – 4)
    = (8x² – 16x) – (6x² – 9x – 12)
    = 8x² – 16x – 6x² + 9x + 12
    = 2x² – 7x + 12
    Chúc bạn học tốt
     

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