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

Toán Lớp 8: phân tích đa thức thành nhân tử: 6x^4+7x^3-37x^2-8x+12

Toán Lớp 8: phân tích đa thức thành nhân tử: 6x^4+7x^3-37x^2-8x+12

Comments ( 2 )

  1. 6x^4 + 7x^3 – 37x^2 – 8x + 12
    = 6x^4 – 12x^3 + 19x^3 – 38x^2 + x^2 – 2x – 6x + 12
    = 6x^3(x – 2) + 19x^2(x – 2) + x(x – 2) – 6(x – 2)
    = (x – 2)(6x^3 + 19x^2 + x – 6)

  2. 6x^4+7x^3-37x^2-8x+12
    =6x^4+19x^3+x^2-6x-12x^3-38x^2-2x+12
    =x(6x^3+19x^2+x-6)-2(6x^3+19x^2+x-6)
    =(6x^3+19x^2+x-6)(x-2)
    =(x-2)(x+3)(2x-1)(x+2)
     

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