Question

dati factor comun 30ab+10a , 15abc+25ac , 4a+8ab-16ac

Answer 1

30ab+10a=10a(3b+a)
15abc+25ac=5ac(3b+5)
4a+8ab-16ac=4a(1+2b-4c)

Answer 2

$\displaystyle 30ab+10a=10a(3b+1) \\ \\ 15abc+25ac=5ac(3b+5) \\ \\ 4a+8ab-16ac=4a(1+2b-4c)$