the first step to solving this is to multiply each term in the parenthesis by -7k -7k x 8k² - 7k x 9k - 7k x 6 now you need to calculate the first product -56k³ - 7k x 9k - 7k x 6 and now calculate the product after that -56k³ - 63k² - 7k x 6 finally,, calculate the last product in the equation -56k³ - 63k² - 42k you can no longer calculate any further,, making your answer: -56k³ - 63k² - 42k let me know if you have any further questions :)
