Question

Suppose that the functions r and s are defined for all real numbers x as follows. r(x)=x-5 s(x)=4x^2 write the expression for (r*s)(x) and (r-s)(x) and evaluate (r=s)(4)

Answer 1

(r*s)(x) = r(x) * s(x) = (x-5)(4x^2)
similarly for the others