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

Toán Lớp 8: (2x^2-1) (x+1/2)=..

Toán Lớp 8: (2x^2-1) (x+1/2)…………..

Comments ( 2 )

  1. Giải đáp:
    = 2x^3 + x^2 – x – 1/2
    Lời giải và giải thích chi tiết:
    (2x^2 – 1)(x + 1/2)
    = 2x^2 (x + 1/2) – 1(x + 1/2)
    = 2x^2 . x + 2x^2 . 1/2 – x – 1/2
    = 2x^3 + x^2 – x – 1/2
    #SunHee

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

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