(i)[4]
Write $2x^2 - 10x + 8$ in the form $a(x + b)^2 + c$, where $a$, $b$ and $c$ are constants, and use your result to state the least value of $2x^2 - 10x + 8$.
(ii)[4]
Find the set of values of $k$ for which the equation $2x^2 - 10x + 8 = kx$ has no real roots.