F (a) = 3a-1

g (a) = a + 4a

Find f (4a) - g (4a)

Answer is - (8a + 1)

Step-by-step explanation:

Step 1: Given f (a) = 3a - 1 and g (a) = a + 4a. Now find f (4a) and g (4a)

⇒ f (4a) = 3 (4a) - 1 = 12a - 1

⇒ g (4a) = (4a) + 4 (4a) = 4a + 16a = 20a

Step 2: FInd the difference between f (4a) - g (4a)

⇒ f (4a) - g (4a) = 12a - 1 - 20a = - 8a - 1 = - (8a + 1)