19 fand g are functions such that 12
(c)
and g(x)=3(2x + 1)
(a) Find g(5)
(b) Find gf(9)

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k