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

Toán Lớp 8: $(2x^3 + 5x^2 – 2x + 3) : (2x^2 – x + 1)$ Thực hiện phép chia

Toán Lớp 8: $(2x^3 + 5x^2 – 2x + 3) : (2x^2 – x + 1)$
Thực hiện phép chia

Comments ( 2 )

  1. (2x^3 + 5x^2 – 2x + 3) : (2x^2 – x + 1)
    =
     

    toan-lop-8-2-3-5-2-2-3-2-2-1-thuc-hien-phep-chia

  2. Giải đáp:
     x+3
    Lời giải và giải thích chi tiết:
     Ta có:
    2.x^3 + 5.x^2 – 2.x + 3
    = (2.x^3 – x^2 + x) + ( 6.x^2 – 3.x + 3)
    = x. (2.x^2 – x+1) + 3.(2.x^2 – x +1)
    = (x+3).(2.x^2 – x+1)
    Vì (x+3).( 2.x^2 – x+1) : (2.x^2 – x+1) = x+3
    ⇒ (2.x^3 + 5.x^2 – 2.x+3) : (2.x^2 – x+1) = x+3
    Vậy (2.x^3 + 5.x^2 – 2.x+3) : (2.x^2 – x+1) = x+3
    @Active Activity

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

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