Answer:
[tex]7ab^3[/tex]
Step-by-step explanation:
the greatest common factor of [tex]42a^5b^3[/tex], [tex]35a^3b^4[/tex], and [tex]42ab^4[/tex]
LEts write the factors for each expression
[tex]42a^5b^3=6*7*a*a*a*a*a*b*b*b[/tex]
[tex]35a^3b^4=5*7*a*a*a*b*b*b*b[/tex]
[tex]42ab^4=6*7*a*b*b*b*b[/tex]
From all the terms we have common factors
7, 'a' and b^3
So GCF is [tex]7ab^3[/tex]