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

Toán Lớp 8: Rút gọn biểu thức: 5×3+4×2−3x(2×2+7x−1)

Toán Lớp 8: Rút gọn biểu thức: 5×3+4×2−3x(2×2+7x−1)

Comments ( 2 )

  1. 5x^{3} + 4x^{2} – 3x(2x^{2} + 7x – 1)
    = 5x^{3} + 4x^{2} – 6x^{3} – 21x^{2} + 3x
    = -x^{3} – 17x^{2} + 3x
     

  2. 5x^3 + 4x^2 – 3x( 2x^2 + 7x – 1 )
    = 5x^3 + 4x^2 – 6x^3 – 21x^2 + 3x
    = -x^3 -17x^2 + 3x  
     

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