Question

find [f*g](x) if
f(x)=x^2-5
g(x)=2x

Answer 1

do you mean
\[[f\times g](x)\]or\[[f\circ g](x)\]

Answer 2

the second one

Answer 3

2x^2 - 5

Answer 4

\[f(x)=x^2-5\]\[g(x)=2x\]

the composition of \(f\) with \(g\) of \(x\)

\[[f\circ g](x)=f\big(g(x)\big)=f(2x)=(2x)^2-5=\]