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23 November, 00:16

How many extraneous solutions does the equation below have?

9 / (n^2+1) = (n+3) / 4

A) 0

B) 1

C) 2

D) 3

+2
Answers (2)
  1. 23 November, 00:43
    0
    To get the number of solutions we proceed as follows;

    9 / (n^2+1) = (n+3) / 4

    cross-multiplying the expression we get;

    9*4 = (n^2+1) (n+3)

    36=n^3+3n^2+n+3

    this can be written as:

    n^3+3n^2+n-33=0

    The above equation a polynomial of degree 3. Therefore we have 3 solutions.
  2. 23 November, 02:10
    0
    There is 0 solutions I just passed the test
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