Answer
$23+10i$
Work Step by Step
FOIL and combine like terms. Make sure to turn $i^2$ into $-1$.
$(8+9i)(2-i)-(1-i)(1+i)$
$16-8i+18i-9i^2-(1+i-i-i^2)$
$25+10i-2$
$23+10i$
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