SOLUTION: please help me with this problem and show how you got the answer: Find (f-g)(5) when f(x)=4x square minus 6 and g(x)=x+4

Algebra ->  Functions -> SOLUTION: please help me with this problem and show how you got the answer: Find (f-g)(5) when f(x)=4x square minus 6 and g(x)=x+4      Log On


   

Question 314800: please help me with this problem and show how you got the answer:
Find (f-g)(5) when f(x)=4x square minus 6 and g(x)=x+4
Answer by malaydassharma(59) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=4x^2-6
g(x)=x+4
(f-g)(5)=f(5) - g(5)
= 4(5)^2 - 6 - [(5)+4]
= 100 - 6 - 9 = 85