If f(x) = 3x + 4 and g(x) = 5 − x, what is the value of (f · g)(x)?
7x2 – 15x + 16
3x2 – 2x + 15
3x2 – 19x – 15
–3x2 + 11x + 20
–7x2 + 15x + 20

Question

If f(x) = 3x + 4 and g(x) = 5 − x, what is the value of (f · g)(x)? 
7x2 – 15x + 16
3x2 – 2x + 15
3x2 – 19x – 15
–3x2 + 11x + 20
–7x2 + 15x + 20

confluxepic · Answer

What a coincidence.

confluxepic · Answer

Your username does not match with the subject you are trying to find help in.

confluxepic · Answer

No offense but don't you think it is too harsh?

confluxepic · Answer

Don't worry. I will still help you.

confluxepic · Answer

You just multiply the two equations.

thesmartone · Answer

(f · g)(x) means f(x) times g(x)

thesmartone · Answer

so it will be (3x+4)(5-x)

thesmartone · Answer

Use the foil method and figure it out...

anonymous · Answer

nah i really don't like math so that's why i signed up here

thesmartone · Answer

Ok??

confluxepic · Answer

Oh.

anonymous · Answer

no smartone that is not a choice soo

thesmartone · Answer

$$(3x+4)(5-x)=3x(5)-3x(x)+4(5)-4(x)$$

thesmartone · Answer

$$15x-3x^2+20-4x=-3x^2+11x+20$$

thesmartone · Answer

Yes it is a choice...

anonymous · Answer

oh truee thanks

thesmartone · Answer

no problem..

confluxepic · Answer

The Smart One really is smart.