Let f(x) = x + 7 and g(x) = x – 2. What is f(x) • g(x)?

x2 – 5x + 14

x2 + 5x – 14

x2 + 5x – 5

x2 + 9x + 5

Question

Let f(x) = x + 7 and g(x) = x – 2. What is f(x) • g(x)?

 x2 – 5x + 14

 x2 + 5x – 14

 x2 + 5x – 5

 x2 + 9x + 5

blurbendy · Answer

foil f(x) and g(x)

(x + 7)(x - 2)

anonymous · Answer

I don't get it if that is not in the answer choices. This is simplified right?

blurbendy · Answer

Do you know what it means to foil?

anonymous · Answer

Yes it is First - Outer - Inner - Last

blurbendy · Answer

Yes, if you foil (x+7)(x-2), you'll get your answer.

anonymous · Answer

Ok so I foiled it so is the final answer x^2 + 5x – 14

blurbendy · Answer

yes, good job

anonymous · Answer

Thank you

blurbendy · Answer

np

anonymous · Answer

can you help me with one more?
The binomial x + 2 is the divisor of 4x3 – 9x2 – 30x + 8. Use complete sentences to explain how you use (either) polynomial division or synthetic division to find the quotient. Be sure to provide this quotient in your answer.