Page 3 - qua1
P. 3

$( ) = 0                             .9
                            ( − 1)( − 2) = 0                          .10
   00                                                                 .11

                                                                   0
                   =0 ; −1=0 ; −2=0

                        =;= ;=

                .$( ) = 0

   .

   21    /∙ ( + 5)
    +5=

   21 = ( + 5) /:

      21 = + 5 /−

      20 = 5 /: 20

            5
         = 20 =

                                                120°                    30°60°90°

                                       2                                        =1
   B 3 =3                                                                                .12

                      .2                                              : 360°

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