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

Toán Lớp 8: (3x+2)^2+2(3x+2)+1) giải giúp em v ạ

Toán Lớp 8: (3x+2)^2+2(3x+2)+1) giải giúp em v ạ

Comments ( 2 )

  1. $= (3x+2+1)^2$
    $= (3x+3)^2$
    $= 9(x+1)^2$

  2. (3x+2)^2+2(3x+2)+1
    =(3x+2)^2+2.(3x+2).1+1^2
    =(3x+2+1)^2
    =(3x+3)^2 

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