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

Toán Lớp 8: tìm x (x^5-x^2-3x^4+3x+5x^3-5):(5+x^2-3x)=0

Toán Lớp 8: tìm x
(x^5-x^2-3x^4+3x+5x^3-5):(5+x^2-3x)=0

Comments ( 1 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    (x^5-x^2-3x^4+3x+5x^3-5)/(x^2-3x+5)=0
    <=> (x^5-3x^4+5x^3-x^2+3x-5)/(x^2-3x+5)=0
    <=> [x^3 (x^2-3x+5)-(x^2-3x+5)]/(x^2-3x+5)=0
    <=> [(x^3-1)(x^2-3x+5)]/(x^2-3x+5)=0
    <=> x^3-1=0
    <=> x^3=1
    <=> x=1
    Vậy x=1

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