Question 698375
collect the like terms (real and imaginary), then add the like terms to get the result
{{{((-5) + sqrt(-16)) + ((-4) + sqrt(-25))}}}
{{{((-5) + (-4)) + (sqrt(-16) + sqrt(-25))}}}
{{{-9 + (4i + 5i)}}}
{{{-9 + 9i}}}