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

Toán Lớp 8: (x^3 + 4x^2 – x – 4) : (x + 4) (x^4 – x^3 – 3x^2 + x + 2) : (x^2 – 1)

Toán Lớp 8: (x^3 + 4x^2 – x – 4) : (x + 4)
(x^4 – x^3 – 3x^2 + x + 2) : (x^2 – 1)

Comments ( 2 )

  1. Giải đáp:+Lời giải và giải thích chi tiết:
    (x^3 + 4x^2 – x – 4) : (x + 4)
    = [(x^3 + 4x^2) – (x + 4)] : (x + 4)
    = [x^2 (x + 4) – (x + 4)] : (x + 4)
    = (x + 4)(x^2 – 1) : (x + 4)
    = x^2 – 1
    —————
    (x^4 – x^3 – 3x^2 + x + 2) : (x^2 – 1)
    = (x^4 – x^3 – x^2 – 2x^2 + x + 2) : (x^2 – 1)
    = [(x^4 – x^2) – (x^3 – x) – (2x^2 – 2)] : (x^2 – 1)
    = [x^2 (x^2 – 1) – x(x^2 – 1) – 2(x^2 – 1)] : (x^2 – 1)
    = (x^2 – 1)(x^2 – x – 2) : (x^2 – 1)
    = x^2 – x – 2

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-8-3-4-2-4-4-4-3-3-2-2-2-1

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