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

Toán Lớp 8: ( x+2) ( x+3 ) ( x+4 ) ( x+5) -24

Toán Lớp 8: ( x+2) ( x+3 ) ( x+4 ) ( x+5) -24

Comments ( 2 )

  1. Giải đáp:
     $(x+2).(x+3).(x+4).(x+5)-24$
    $= (x²+5x+6).(x²+9x+20)-24$
    $= x^4+14x³+71x²+154x+120-24$
    $= x^4+14x³+71x²+154x+96$
     

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

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