Answer:
(-6a^3b + 2ab^2)(5a^2 - 2ab^2 - b)
Multiply each term in the first parenthesis by each term in the second parenthesis.
Then combine like terms.
-30a^5b +12a^4b^3 +6a^3b^2 +10a^3b^2 -4a^2b^4 -2ab^3
-30a^5b + 12a^4b^3 +16a^3b^2 - 4a^2b^4 - 2ab^3
LETTER B