P^2-6p+5=(p-2)(p-3) ///////////:////////
236.5% is the correct answer
Answer:
Step-by-step explanation:
Given
Required
Number of books in 1 week
Represent the number of books in 1 week with x.
So, we have:
Cross Multiply
Convert fraction to improper fraction
Multiply through by 
<em>Hence: 12/7 books were read in a week</em>
First join the log4 on the left:
log4( x*(x-3) = log4(-7x+21)
Then x = -7, works: -7*(-10)=70 = -7*(-7)+21
x=-3, 18 = 42, does not work
x=3 0=0 works,
However, when one puts x = -7 in the *original* exression, log4(-7) or log4(-10) do not exist (you know why?). So x= -7 is extraneous.
Now x=3 gives log4(0) on the left and right, which does not exist.
So, C is the answer, both are extraneous. Seem to work but indeed don't work in the *original* equation
