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

Toán Lớp 7: (2x^3 – 2x + 1) – (3x^2 + 4x – 1) = ?

Toán Lớp 7: (2x^3 – 2x + 1) – (3x^2 + 4x – 1) = ?

Comments ( 2 )

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

  2. (2x^3-2x+1)-(3x^2+4x-1)
    =2x^3-2x+1-3x^2-4x+1
    =2x^3-3x^2-(2x+4x)+(1+1)
    =2x^3-3x^2-6x+2

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

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