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

Toán Lớp 8: $x^{3}$ $-$ $27$ $+$ $3x$ $($ $x$$-$$3$ $)$ Đề: phân tích nhân tử

Toán Lớp 8: $x^{3}$ $-$ $27$ $+$ $3x$ $($ $x$$-$$3$ $)$
Đề: phân tích nhân tử

Comments ( 2 )

  1. x^3-27+3x(x-3)
    =x^3-3^3+3x(x-3)
    =(x-3)(x^2+3x+9)+3x(x-3)
    =(x-3)(x^2+3x+9+3x)
    =(x-3)(x^2+6x+9)
     

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