SOLUTION: Let f(x)=6x+3. Find f(x)-f(a) divided by x-a, if x does not equal a. My question is do I simply plug in x and then plug a and simplify? So the answer would be 3?

Algebra ->  College  -> Linear Algebra -> SOLUTION: Let f(x)=6x+3. Find f(x)-f(a) divided by x-a, if x does not equal a. My question is do I simply plug in x and then plug a and simplify? So the answer would be 3?      Log On


   

Question 711160: Let f(x)=6x+3. Find f(x)-f(a) divided by x-a, if x does not equal a.
My question is do I simply plug in x and then plug a and simplify? So the answer would be 3?
Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
Not sure how you got 3... See below:
f%28x%29=6x%2B3
f%28a%29=6a%2B3
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Find f(x)-f(a) divided by x-a:
%286x%2B3-6a-3%29%2F%28x-a%29
%286x-6a%29%2F%28x-a%29
Factor out 6 from the numerator:
6%28x-a%29%2F%28x-a%29
highlight%286%29
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Good Luck,
tutor_paul@yahoo.com