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

Toán Lớp 8: -2x²(2x²-3x+5) cho mik hỏi bài này ik mọi người

Toán Lớp 8: -2x²(2x²-3x+5) cho mik hỏi bài này ik mọi người

Comments ( 2 )

  1. -2x²(2x²-3x+5)
    =(-2x^2) . (2x^2)-(2x^2.(-3x))-(2x^2).(5)
    =-4x^4+6x^3-10x^2

  2. -2x^2(2x^2-3x+5)
    =-2x^{2}.2x^2+2x^{2}.3x-2x^{2}.5
    =-4x^4+6x^3-10x^2
     

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

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