Question 211289
(3 * 2 sqrt 7)(3 + 2 sqrt 7)
{{{6sqrt(7)*(3 + 2sqrt(7))}}}
= {{{18sqrt(7) + 2*6*sqrt(7)*sqrt(7)}}}
= {{{18sqrt(7) + 2*6*7}}}
= {{{18sqrt(7) + 84}}}