agentkronus
agentkronus
02-03-2015
Mathematics
Answered
Find x when P = 21.
P = x(x - 1) / 2
Answer :
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
VIEW ALL ANSWERS ( 63+ )
Other Questions
Additions or deletions of bases in the nucleotide sequence of a structural gene most often result in (A) an altered sequence of amino acids in the protein that
What is the definition of the science of designing replacement parts for the human body
Solve by completing the squarex squared +14x - 51=0
What is 8?......,,??..,,..,,,,,?
how does sunlight provide the energy the girl needs to swing the bat??
Why do you think Monstresor keeps asking Fortunato to drink Medoc
omnivores and carnivores of boreal forest
What does an ecopsychologist study?
Express 72 as a percentage of 92
How many mole ratios can be written for a chemical reaction involving 3 substances