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

Toán Lớp 8: PTĐT thành nhân tử: x mũ 6 – x mũ 4 + 2 x mũ 3 + 2 x mũ 2

Toán Lớp 8: PTĐT thành nhân tử:
x mũ 6 – x mũ 4 + 2 x mũ 3 + 2 x mũ 2

Comments ( 1 )

  1. #huy
    x^6-x^4+2x^3+2x^2
    =x^2[x^4-x^2+2(x+1)]
    =x^2[x^2(x-1)(x+1)+2(x+1)]
    =x^2(x+1)(x^3-x^2+2)
    =x^2(x+1)(x^3+x^2-2x^2+2)
    =x^2(x+1)[x^2(x+1)-2(x-1)(x+1)]
    =x^2(x+1)(x^2-2x+2)

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

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