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

Toán Lớp 8: x^4+ 3x^3+ x + 3===–…

Toán Lớp 8: x^4+ 3x^3+ x + 3=……………………………..

Comments ( 2 )

  1. Gửi bạn:
    $x^{4}+3x^{3}+x+3=x^{3}(x+3)+(x+3)=(x+3)(x^{3}+1)=(x+3)(x+1)(x^{2}-x+1)$ 

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

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