3 by othmanagzennai

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									                                                 .3

                                                                                          :
                                                 .                      20           33             -

                                            3+ 2 2                         (1+ 2)2                  -

                                                3–2 2                      (1 - 2)2                 -
                                        2             7
                                                      2 2
                  .                                       :                                         -
                                    5− 3         3+ 2   7

                                                                    1+ 3                            -
                                                           9 + 16    9 + 16                         -

                                                                                                   .1


                                                                           .                        a
      . a             a                                a


                                                                                                   .2
                                            :                                         b           a •
(     2
    a =a  )
    a×b= a× b.
    a         a
      =
    b         b
                                                                                                    •
                                            a2 = - a                             a

                                                                                              :

    9 = 32 = 3 ,          25× 16 = 25 × 16 = 5 × 4 =20
     49   49 7
        =   =                3–2 2= 2–1 ,                     (-5)2 = -(-5) =5
     64   64 8


                                                       20             42




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