Question 270260
{{{(7 + i) + (-10 + 5i)}}} Start with the given expression.



{{{7 + i -10 + 5i}}} Remove the parenthesis.



{{{(7-10) + (i + 5i)}}} Group like terms (ie separate the real and imaginary parts).



{{{-3 + 6i}}} Combine like terms.



So {{{(7 + i) + (-10 + 5i)=-3 + 6i}}}