Question

find f*g f(x) = x+1, g(x)=x^2+4

Answer 1

multiply them

Answer 2

(x+1)*(x^2+4)

Answer 3

this is as far as i got (x+2)(x+2)+1

Answer 4

(x+1) (x^2+4)= x^3+x^2+4x+4. You can combine them, so like from the first two, you can take out a x^2 for example, you will have x^2(x+1)+4(x+1) because you can combine the 4x+4, what's common with both of those number, in other words what can you take out of both of them? You can take out a 4, so your left with 4(x+1), that's how you get x^2(x+1)+4(x+1). You see that the x+1 is common in both, so your answers are x^2, 4, x+1. You have three answers, how you know is because in your original equation you started with x^3, which means you will have 3 possible answers.