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

Toán Lớp 8: X ² (4x ³ – 5xy + 2x) * (-1/2xy) Giúp tớ với

Toán Lớp 8: X ² (4x ³ – 5xy + 2x) * (-1/2xy)
Giúp tớ với

Comments ( 2 )

  1. Chữ mk hơi xấu mong bn thông cảm cho mk ạ
    toan-lop-8-4-5y-2-1-2y-giup-to-voi

  2. Giải đáp:
    x²(4x³ – 5xy + 2x)(\frac{-1}{2}xy)
    = [x² . 4x³ + x² . (-5xy) + x² . 2x](\frac{-1}{2}xy)
    = [4x^{5} – 5x³y + 2x³](\frac{-1}{2}xy)
    = 4x^{5} . (\frac{-1}{2}xy) + (-5x³y) . (\frac{-1}{2}xy) + 2x³ . (\frac{-1}{2}xy)
    = -2x^{6}y + \frac{5}{2}x^{4}y² – x^{4}y
    Chúc học tốt!!!
     

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

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