agentkronus
agentkronus
02-03-2015
Mathematics
contestada
Find x when P = 21.
P = x(x - 1) / 2
Respuesta :
konrad509
konrad509
02-03-2015
[tex]21=\dfrac{x(x-1)}{2}\\ 42=x^2-x\\ x^2-x-42=0\\ x^2+6x-7x-42=0\\ x(x+6)-7(x+6)=0\\ (x-7)(x+6)=0\\ x=7 \vee x=-6[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 19+ )
Otras preguntas
ming has a goal to jog 4 1/2 miles each day.On Monday she jogged 5 9/16 miles.By how much did she exceed her goal for that day?
Why will knowledge of the human genome enable scientists to better understand proteins involved in human diseases?
what types of atoms form metallic bonds?
True/False selective breeding is the only method to change life forms characteristics
Please if you can help me out in this I’d be much more appreciated it’s due today and I’ve been stuck in this problem thank you
What were the long term causes of the french revolution?
what might happen if national government ceded their authority to a world government by international treaty?
Identify two major effects of new technology on business during the Industrial Revolution.A.Production became faster and less expensive.B.Workers made more mone
In the United States, the concept of political parties began during the administration of B. Franklin Delano Roosevelt. C. George Washington. D. Abraham Linc
The Official Training Bike of Le Tour de France automatically adjusts wind resistance based on what two features of the rider?
