Answer:
[tex]3x \times (x + 4)(x - 5)[/tex]
Step-by-step explanation:
3x³ - 3x² - 60x
3x × (x² - x - 20)
3x × (x² + 4x - 5x - 20)
3x × (x × (x + 4) - 5 (x + 4))
= 3x × (x + 4)(x - 5)
