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

Toán Lớp 6: ( x+1) mũ 2 – (x+1) = 0 Chứng minh ( x+1) mũ 2= (x+1)

Toán Lớp 6: ( x+1) mũ 2 – (x+1) = 0
Chứng minh ( x+1) mũ 2= (x+1)

Comments ( 2 )

  1. ( x + 1 )^2 – ( x + 1 ) = 0
    ⇔ ( x + 1 )^2 = 0 + ( x + 1 )
    ⇔ ( x + 1 )^2 = x + 1 ( Điều phải chứng minh )

  2. (x+1)^2 -(x+1)=0
    Có tổng cộng $2$ cách chứng minh :
    C_1:(x+1)^2 -(x+1)=0
    =>(x+1)=(x+1)^2 -0
    =>(x+1)=(x+1)^2 ->đpcm
    C_2:(x+1)^2 -(x+1)=0
    =>(x+1)^2 = 0+(x+1)
    =>(x+1)^2 =(x+1) ->đpcm

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

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