Since \( x = \sqrtv \), each positive root \( x_i \) corresponds to a positive root \( v_i = x_i^2 \). However, we are asked for the sum of the roots of the original equation in terms of \( v \), not \( x \). The sum of the roots of the original equation in \( v \) corresponds directly to the sum of \( x_i^2 \), but this is not simply the sum of the \( x_i \)'s. Instead, note that since we are only asked for the sum of roots (and given all are positive, and the transformation is valid), the number of valid \( x \)-roots translates to transformable \( v \)-roots, but the sum of the original \( v_i \) values corresponds to the sum of \( x_i^2 \), which is not directly \( 4^2 = 16 \). - Groen Casting