First you divide everything by 4 which will become b^2+2b-3=0
Then you can factor this which is
(b-1)(b+3)=0
B=1
B=-3 ... I think that's how you do it
There could be one more pentagon
**As far as I know
Answer:
you didn't feature any graphs for me to choose from
12:5 is what you are looking for. 12/5 in fraction form
I'm pretty sure its 80, if this isnt for school i suggest Calculator Soup's LCM calculator (:
