SOLUTION: hello. this question was on my last math test and I got the answer wrong. I am not sure how to solve it and was wondering if you could help. Thank you!!! (2a/a^2+9a+8) - (3a/a^2

Algebra ->  Test -> SOLUTION: hello. this question was on my last math test and I got the answer wrong. I am not sure how to solve it and was wondering if you could help. Thank you!!! (2a/a^2+9a+8) - (3a/a^2      Log On


   

Question 758406: hello. this question was on my last math test and I got the answer wrong. I am not sure how to solve it and was wondering if you could help. Thank you!!!
(2a/a^2+9a+8) - (3a/a^2+8a+7)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

2a%2F%28a%5E2%2B9a%2B8%29+-+3a%2F%28a%5E2%2B8a%2B7%29

2a%2F%28a%5E2%2Ba%2B8a%2B8%29+-+3a%2F%28a%5E2%2Ba%2B7a%2B7%29

2a%2F%28%28a%5E2%2Ba%29%2B%288a%2B8%29%29+-+3a%2F%28%28a%5E2%2Ba%29%2B%287a%2B7%29%29

2a%2F%28a%28a%2B1%29%2B8%28a%2B1%29%29+-+3a%2F%28a%28a%2B1%29%2B7%28a%2B1%29%29

2a%2F%28%28a%2B8%29%28a%2B1%29%29+-+3a%2F%28%28a%2B7%29%28a%2B1%29%29.......common denominator

%282a%28a%2B7%29+-+3a%28a%2B8%29%29%2F%28%28a%2B8%29%28a%2B7%29%28a%2B1%29%29

%282a%5E2%2B14a+-+3a%5E2-24a%29%2F%28%28a%2B8%29%28a%2B7%29%28a%2B1%29%29

%28+-+a%5E2-10a%29%2F%28%28a%2B8%29%28a%2B7%29%28a%2B1%29%29

-a%28+a%2B10%29%2F%28%28a%2B8%29%28a%2B7%29%28a%2B1%29%29

solutions will be a that make numerator equal to zero, since denominator cannot be equal to zero

so, -a%28+a%2B10%29=0 if a=0 or a=-10