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27 votes
Find (qor)(x) and (ro q)(x).

q(x) = 4x + 3
r(x) = 6x
Write your answer as a polynomial in simplest form.
(qor)(x) = [
(roq)(x) =
Please help again

User Jackrabbit
by
2.9k points

2 Answers

23 votes
23 votes

Answer: (qor)(x)=24x+3

(roq)(x)=24x+18

Explanation:

q(x) = 4x + 3

r(x) = 6x

(qor)(x)=

q(r(x))=

q(6x)=

4(6x)+3=24x+3

(roq)(x)=

r(4x+3)=

6(4x+3)=24x+18

User Emre Nevayeshirazi
by
3.0k points
14 votes
14 votes


(q \circ r)(x)=q(r(x)) \\ \\ =q(6x) \\ \\ =4(6x)+3 \\ \\ =24x+3 \\ \\ \\ \\ (r \circ q)(x)=r(q(x)) \\ \\ =r(4x+3) \\ \\ =6(4x+3) \\ \\ =24x+18

User JohnPS
by
3.1k points