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

Toán Lớp 8: x^3+x^2-4x-4 Giúp mình phân tích ạ

Toán Lớp 8: x^3+x^2-4x-4
Giúp mình phân tích ạ

Comments ( 2 )

  1. $@toxic$
    x^3+x^2-4x-4$\\$=x^2+3x^2+2x-2x^2-6x-4$\\$=x(x^2+3x+2)-2(x^2+3x+2)$\\$=(x-2)(x^2+3x+2)$\\$=(x-2)(x^2+2x+x+2)$\\$=(x-2)(x(x+1)+2(x+1)$\\$=(x-2)(x+1)(x+2)

  2. Giải đáp:
     $x³+x²-4x-4$
    $= (x³+x²)-(4x+4)$
    $= x².(x+1)-4.(x+1)$
    $= (x²-4).(x+1)$
    $= (x-2).(x+2).(x+1)$
     

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