SOLUTION: Hi, Please help me to solve step-by-step on these questions. Thank you very much. 7. Refer to Section 7.2 in the text for examples to subtract the following rational expression

Question 1112603: Hi,
Please help me to solve step-by-step on these questions.
Thank you very much.
7. Refer to Section 7.2 in the text for examples to subtract the following rational expression. Show the steps necessary to get a common denominator, perform the operation, and simplify the final answer to lowest terms :
(n^2-5n)/(n^2+8n+16) - 6/(n + 4)
9. Given the rational equation :
x/(x+1) + 9x/(x^2+3x+2) = 12/(x+2)
List the values of x (if any) for which the expressions in this equation are undefined.
What expression could be used to clear the fractions ?
Solve the equation showing all steps. Be sure to check the solutions.

Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!

LCD (n+4)^2

--------

For x=-1 or x=-2 not defined
Multiply the equation by (x+1)(x+2)
weget
x(x+2) +9x = 12(x+1)

(x-4)(x+3)=0
x=4 or -3
Plug x=4
(4/(4+1)) + (9*4/((4+2)(4+1))) = 2
12/(x+2) -> 12/(4+2)=2
You plug -3 and try

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