Respuesta :

Answer:

x³ -x²-30x+72

Step-by-step explanation:

→ ( x - 3 ) ( x - 4 ) ( x + 6 )

[ expand and open brackets ]

→ ( x² -4x -3x + 12 ) ( x + 6 )

[ simplify ]

→ ( x² -7x + 12 ) ( x + 6 )

[ expand ]

→ x³ +6x² -7x²  - 42x + 12x + 72

[ simplify/ final answer ]

→ x³ -x² -30x +72

[tex](x-3)(x-4) (x + 6)[/tex]

[expand and open brackets ]

[tex]→(x² -4x -3x + 12 ) ( x + 6)[/tex]

[simplify]

[tex]→(x² -7x + 12) (x+6)[/tex]

[expand]

[tex]→x³ +6x² -7x² - 42x + 12x + 72[/tex]

[simplify/final answer ]

[tex]→x³ -x² -30x +72[/tex]