É possível estabelecer alguma relação entre as parcelas de uma adição e a respectiva soma?

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

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

If two points are given,then exactly one line can be drawn through those two points.which geometry term does the statement represent