Answer:
B. [tex]-5x(x^{2} +2x+3)[/tex]
Step-by-step explanation:
[tex]-5x^{3} -10x^{2} -15x[/tex]
Apply exponent rule
[tex]-5x^{2} x-10xx-15x[/tex]
Rewrite 15 as 5*3
Rewrite 10 as 5*2
=[tex]5x^{2} x-5*2xx-5*3x[/tex]
Factor out common term -5x
=[tex]-5x(x^{2} +2x+3)[/tex]
