(10g^3 - 8g^2 + g - 14)(10g^2 + g)
Multiply eah term by 10g^2 and then add it to each term times g
100g^5 - 80g^4 + 10g^3 - 140g^2 + 10g^4 - 8g^3 + g^2 - 14g)
Combine like terms
100g ^5 - 80g^4 + 10g^4 + 10g^3 - 8g^3 - 140g^2 + g^2 - 14g
100g^5 - 70g^4 + 2g^3 - 139g^2 - 14g
Answer: 100g^5 - 70g^4 + 2g^3 - 139g^2 - 14g
hope it helps :)