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

Toán Lớp 8: a)( x + 3 )2 + ( 2 – x )( x + 5 )

Toán Lớp 8: a)( x + 3 )2 + ( 2 – x )( x + 5 )

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    ( x+3 )2 + ( 2-x )(x + 5) = x2+x3+2x-5x + 2x – 5x= -1x
     

  2. ( x + 3 )^2 + ( 2 – x )( x + 5 )
    =x^2+6x+9+2x+10-x^2-5x
    =3x+19
     

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