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

Toán Lớp 8: ( 2x^2 – x^2 – x + 1 ) : (x^2 – 2x ) Giúp mình với!

Toán Lớp 8: ( 2x^2 – x^2 – x + 1 ) : (x^2 – 2x )
Giúp mình với!

Comments ( 2 )

  1. ***Lời giải***
    \frac{2x^2 – x^2 – x + 1}{x^2 – 2x}
    =\frac{ x^2 – x + 1}{x^2 – 2x}
    =\frac{ x^2 – 2x+x + 1}{x^2 – 2x}
    =\frac{ x^2 – 2x}{x^2 – 2x}+\frac{x + 1}{x^2 – 2x}
    =1+\frac{x + 1}{x^2 – 2x}
    Vậy ( 2x^2 – x^2 – x + 1 ) : (x^2 – 2x )=1 dư x + 1

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

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