SOLUTION: Simplify the expression. State the excluded values of the variables a^2+16a+63 ----------- a+7 (Sorry that is a fraction above)

Algebra ->  Expressions-with-variables -> SOLUTION: Simplify the expression. State the excluded values of the variables a^2+16a+63 ----------- a+7 (Sorry that is a fraction above)      Log On


   

Question 638733: Simplify the expression. State the excluded values of the variables
a^2+16a+63
-----------
a+7

(Sorry that is a fraction above)
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
For excluded values look at denominators and square roots. Values that make the denominator 0 or square roots - are excluded. In this case a=-7 makes the denominator 0. So a=-7 is excluded.


Factor the top: a%5E2%2B16a%2B63+=+%28a%2B7%29%28a%2B9%29.


%28a%2B7%29%28a%2B9%29+%2F+%28a%2B7%29+ The (a+7) terms cancel. The simplified version is a+9.