Question

Zredukuj wyrazy podobne:

a) a-b(a+b)(2a-b)=

b) 3a²-6a+4

--------------- =

a²-9a+6

c) 8b²-4b+3

----------------- =

4b²-b+0,75

------------ tak oznacz kreskę ułamkową ;)

Answer 1

a) a-b(a+b)(2a-b)=a²+ab-ab+b²(2a-b)=(a²+b²)(2a-b)=2a³-a²b-2ab²-b³

 

b) 3a²-6a+4                           1                    3+2+2              4

---------------   =  3a²-6a+4 * --------   =    -------------- =    --------

a²-9a+6                                 a²-9a+6              3+3               3

 

c) 8b²-4b+3            2+4+3              8                     4                   24

----------------- =   ------------- = ------------  = 8* ---------   = - ----------- = 8

4b²-b+0,75                  0,75          3/4                     3                    3