Question 33630
{{{4/(7+i)}}}
{{{4(7-i)/(7+i)(7-i)}}}   (rationalising the denominator)
{{{(28 - 4i)/(49 - i^2)}}}
{{{(28 - 4i)/(49+1)}}} ( since {{{i ^2 = -1}}})
{{{(28-4i)/50}}}
{{{2(14 - 2i)/50}}}
{{{(14 - 2i)/25}}}