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

Toán Lớp 8: x^2-2x+1=0 Giải giúp mình bài này

Toán Lớp 8: x^2-2x+1=0
Giải giúp mình bài này

Comments ( 2 )

  1. x^2-2x+1=0
    ->x^2-2.x.1+1^2=0
    ->(x-1)^2=0
    ->(x-1)^2=0^2
    ->x-1=0
    ->x=0+1
    ->x=1
     Vậy x=1

  2. Answer
    x^2 – 2x + 1 = 0
    => x^2 – 2 . x . 1 + 1^2 = 0
    => (x – 1)^2 = 0
    => (x – 1)^2 = 0^2
    => x – 1 = 0
    => x = 0 + 1
    => x = 1
    Vậy x = 1

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