Question 181493
{{{sqrt(5)(2sqrt(45)-sqrt(5))}}}
:
{{{2sqrt(5*45)-5}}}distributed the terms and {{{sqrt(5)}}}multiplied by itself is 5
:
{{{2sqrt(225)-5)}}}
:
{{{2(15)-5=25}}}
:
{{{7/(1-sqrt(3))}}}....multiply top and bottom by {{{1+sqrt(3)}}}.
:
{{{7(1+sqrt(3))/(1-3)}}} because {{{1-sqrt(3)}}}multiplied by {{{1+sqrt(3)}}}=
1-3...middle terms cancel each other
:
{{{-(7+7sqrt(3))/2}}}