From the product of (ab+b+1)and (b-5) subtract 4ab² + 9b²

From the product of (ab+b+1)and (b-5) subtract 4ab² + 9b²

 [(ab+b+1)(b-5)] – (4ab² + 9b²)

[(ab+b+1)b - (ab+b+1)5] - (4ab² + 9b²)

 ab² + b² + b – 5ab – 5b – 5 – 4ab² - 9b²

-3ab² - 8b² - 4b -5ab – 5 Ans