Answer
$3-2i$
Work Step by Step
Removing the grouping symbol and then combining the real parts and the imaginary parts, the given expression, $
(2-i)-(-1+i)
,$ simplifies to
\begin{array}{l}\require{cancel}
(2-i)-(-1+i)
\\\\=
2-i+1-i
\\\\=
(2+1)+(-i-i)
\\\\=
3-2i
.\end{array}