Question

d) 12b × b-1/4 + 14 × b²-2b/21 - b-b²/3=

/-kreska ułamkowa:D

Answer 1

* - do kwadratu

 

 

12b × b-1/4 + 14 × b²-2b/21 - b-b²/3=12b*-1/4+14b*- 2b/21-21b/21=26b*-1/4- 19b/21- b*/3=3x26b*/3 - 1/4 - 19b/21 - b*/3=78b*/3 -b*/3 - 1/4 - 19b/21=

76b*/3-1/4-19b/21

 

mam nadzieje że dobrze :P