Question

If f(x) = 2x – 3 and g(x) = 4x + 5, what is (f • g)(x)?

Answer 1

if you mean f(x)×g(x)

the answer will be like that

(2x-3)×(4x+5)=8x²+10x-12x-15=8x²-2x-15

and if you mean f(g(x)) the answer will be like that

f(4x+5)=2×(4x+5)-3=8x+7

Answer 2

Place the f(x) expression 2x-3 into the x in the g(x) expression 4x+5, so it will be 4(2x-3)+5; you can expand it out if you want