indicated operation/simplify

Question

Perform the indicated operations and simplify your answer:

(4x-3)(x^2-x-9)

Answer 1

Use the factor (x² - x - 9) as the common factor.  Then rewrite the given product as a summation of products.

 

4x(x² - x - 9) - 3(x² - x - 9)

 

 

Now just distribute the terms to get rid of parentheses.  Then combine like terms.