SOLUTION: if f(x)= x squared + 5x and g(x)= 2x-x squared, find f(a+1)-g(a+1)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: if f(x)= x squared + 5x and g(x)= 2x-x squared, find f(a+1)-g(a+1)      Log On


   

Question 74015: if f(x)= x squared + 5x and g(x)= 2x-x squared, find f(a+1)-g(a+1)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
if f(x)= x^2 + 5x ; g(x)= 2x-x^2, find f(a+1)-g(a+1)
-------
1st find f(x)-g(x):
f(x)-g(x) = [x^2+5x] - [2x-x^2] = 2x^2+3x
--------
Then find f(a+1)-g(a+1)
=2(a+1)^2 + 3(a+1)
=2[a^2+2a+1] + 3[a+1]
=2a^2+7a+5
==============
Cheers,
Stan H.