Please help me! I need the answer

hello there here is my answer
[tex] = (5 {x}^{2} - 2) \: \: \: (x + 3)[/tex]
hope it helps
#carry on learning
Answer:
(x + 3)
Step-by-step explanation:
5x³ + 15x² - 2x - 6 ( factor the first/second and third/fourth terms )
= 5x²(x + 3) - 2(x + 3) ← factor out (x + 3) from each term
= (5x² - 2)(x + 3)
The missing factor is (x + 3)