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

Toán Lớp 8: 2x^3+5x^2-2x+3: 2x^2-x+1 Mn tính ngang giùm mk nha

Toán Lớp 8: 2x^3+5x^2-2x+3: 2x^2-x+1
Mn tính ngang giùm mk nha

Comments ( 2 )

  1. Giải đáp:
    $(2x^3+5x^2-2x+3): (2x^2-x+1)=x+3$
    Lời giải và giải thích chi tiết:
    $(2x^3+5x^2-2x+3): (2x^2-x+1)$
    $=(2x^3-x^2+x+6x^2-3x+3): (2x^2-x+1)$
    $=[(2x^3-x^2+x)+(6x^2-3x+3)]: (2x^2-x+1)$
    $=[x(2x^2-x+1)+3(2x^2-x+1)]: (2x^2-x+1)$
    $=(x+3)(2x^2-x+1): (2x^2-x+1)$
    $=x+3$

  2. $(2x^3+5x^2-2x+3): (2x^2-x+1)$
    $=(2x^3-x^2+x+6x^2-3x+3): (2x^2-x+1)$
    $=[(2x^3-x^2+x)+(6x^2-3x+3)]: (2x^2-x+1)$
    $=[x(2x^2-x+1)+3(2x^2-x+1)]: (2x^2-x+1)$
    $=(x+3)(2x^2-x+1): (2x^2-x+1)$
    $=x+3$
     

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