- The roots of the equation
$$x ^ { 3 } - 2 x ^ { 2 } + 4 x - 5 = 0$$
are \(p , q\) and \(r\).
Without solving the equation, find the value of
- \(\frac { 2 } { p } + \frac { 2 } { q } + \frac { 2 } { r }\)
- \(( p - 4 ) ( q - 4 ) ( r - 4 )\)
- \(p ^ { 3 } + q ^ { 3 } + r ^ { 3 }\)