Question 624501
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Note:   {{{root(a,p)*root(a,q) = root(a,p*q)}}}
{{{sqrt(7x)(sqrt(x) - 7sqrt(7)) = sqrt(7x^2) - 7sqrt(49x) = x*sqrt(7)-49sqrt(x)}}}