Answer:
(5 x + 4) (x - 1)
Step-by-step explanation:
Factor the following:
x (5 x + 4) - (5 x + 4)
Hint: | Pull a common factor out of x (5 x + 4) - (5 x + 4).
Factor 5 x + 4 out of x (5 x + 4) - (5 x + 4), resulting in (5 x + 4) (x - 1):
Answer: (5 x + 4) (x - 1)
