154k views
0 votes
Let f(x) = 6x-5 and g(x) = 2x-1. Find f • g

I thought the answer was 12x^3 - 6x^2 - 10x + 5 but my computer says it's wrong

User J Will
by
8.1k points

1 Answer

2 votes

f of g = 6(2x-1) - 5

12x - 6 - 5

12x - 11

Instead of just multiplying the binomials, f of g implies actually substituting the value of g for every appearance of x in the value of f. If it asked for g of f, you would substitute the x in 2x - 1 with 6x - 5, so it would be 2(6x-5) - 1.

User Dkubb
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories