So the question is: Find the least common denominator for these two rational expressions
n/n^2-1 and -n/n^2+8n-9
please help me find the answer and show the work so i can understand how to find it?
n/n^2-1 and -n/n^2+8n-9
please help me find the answer and show the work so i can understand how to find it?
-
LCD = common factors * other factors
n/(n² - 1); -n/(n² + 8n - 9)
n/((n + 1)(n - 1)); -n/((n + 9)(n - 1))
LCD = (n - 1)(n + 1)(n + 9)
n/(n² - 1); -n/(n² + 8n - 9)
n/((n + 1)(n - 1)); -n/((n + 9)(n - 1))
LCD = (n - 1)(n + 1)(n + 9)