Plz solve question 6

$6. 24a^3+37a^2-5a$

Dear student,
24a³ + 37a² -5a
a( 24a² +37a-5)
a(24a²+40a-3a-5)
a[8a(3a+5)-1(3a+5)]
a(8a-1)(3a+5)
Regards