Answer:
The value of (gof)(4) is - 31
Step-by-step explanation:
Given as :
g(n) = n² - 40
f(n) = 2n - 5
So , (gof)(n) = ( 2n - 5 )² - 40
Or, (gof)(n) = 4n² - 20n +25 - 40
Or, (gof)(n) = 4n² - 20n - 15
Now At n = 4
I.e (gof)(4) = 4(4)² - 20 ( 4 ) - 15
Or, (gof)(4) = 64 - 80 - 15
Or, (gof)(4) = - 31
Hence The value of (gof)(4) is - 31 Answer
