Re: [請益] 請問數學補教老師…一題數學

[coco100 (站在十字路口交點)]

    2       2     2     2
   a + (a+1) + [(a + a)]

    2       2          2
=> a + (a+1) + [a(a+1)]

    2       2   2     2
=> a + (a+1) + a (a+1)

        2   2         2
=> (a+1) + a [ 1+(a+1) ]

        2   2   2
=> (a+1) + a ( a + 2a + 2 )

        2   2    2
=> (a+1) + a  [ a + 2 (a+1) ]

        2   4      2
=> (a+1) + a  + 2 a (a+1)

      2 2      2             2
=> ( a )  + 2 a (a+1) + (a+1)

      2         2
=> [ a + (a+1) ]


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