11) (3n^2 - n) / n^2 _________________ (n^2 -1 )/( n +1) = n*(3n -1) / n^2 _________________ (n+1)(n -1 )/( n +1) = (3n -1) / n _________________ (n -1 ) = (3n -1) _________________ (n^2 -n ) 12. The width w of a rectangular swimming pool is 7x2. The area A of the pool is 7x3 – 42x2. What is an expression for the length of the pool? Show your work. Determine whether each question is biased. Explain your answer. length *width =area length *7x^2 =7x^3 -42x^2 length =(7x^3 -42x^2)/7x^2 length =x -6 Solution 11) (3n^2 - n) / n^2 _________________ (n^2 -1 )/( n +1) = n*(3n -1) / n^2 _________________ (n+1)(n -1 )/( n +1) = (3n -1) / n _________________ (n -1 ) = (3n -1) _________________ (n^2 -n ) 12. The width w of a rectangular swimming pool is 7x2. The area A of the pool is 7x3 – 42x2. What is an expression for the length of the pool? Show your work. Determine whether each question is biased. Explain your answer. length *width =area length *7x^2 =7x^3 -42x^2 length =(7x^3 -42x^2)/7x^2 length =x -6.