2a^2b^3(4a^2+3ab^2-ab)=? <span> is what I presume you actually meant. </span> <span> Pull out the common factors of (4a^2+3ab^2-ab) and you will get </span> <span> a(4a+3b^2 -b) </span>
Substitute this back into the original equasion and you get <span> 2a^2b^3[a(4a+3b^2-b)] = </span> 2a^3b^3(4a+3b^2-b) = <span>2a^3b^3(4a-b+3b^2)
I hope my answer has come to your help. Thank you for posting your question here in Brainly. </span>
