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

Toán Lớp 8: Làm tính chia: (2x^4 – 5x ² + x ³ – 3 – 3x) : (x ² – 3) Gấp ạaaaaaaaaaaa

Toán Lớp 8: Làm tính chia:
(2x^4 – 5x ² + x ³ – 3 – 3x) : (x ² – 3)
Gấp ạaaaaaaaaaaa

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    (2x^4-5x^2+x^3-3-3x):(x^2-3)
    = (2x^4-5x^2+x^3-3-3x)/(x^2-3)
    =(2x^4+x^2-6x^2+x^3-x-3x)/(x^2-3)
    =(x^2(2x^2+x+1)-3(2x^2+x+1))/(x^2-3)
    =((2x^2+x+1)(x^2-3))/(x^2-3)
    =2x^2+x+1

  2. $\\2x^4 – 5x^2 +x^3-3-3x\\= 2x^4 +x^3 – 5x^2-3x-3\\=(2x^4 – 6x^2) + (x^2 – 3) + (x^3-3x)\\=2x^2 (x^2-3) + (x^2-3)+x(x^2-3)\\=(x^2-3)(2x^2+x+1)\\(2x^4 – 5x^2 +x^3-3-3x):(x^2-3)\\=(2x^2+x+1)(x^2-3):(x^2-3)\\=2x^2+x+1$
    Vậy $(2x^4 – 5x^2 +x^3-3-3x):(x^2-3)=2x^2+x+1$

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

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