The expression is
(Multiply: )
(Substitute the imaginary unit value )
(Product of two same signs is positive) \ \
\
The simplified expression is 12.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7e31847e21ffbe5a80ea8b99913d5838.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=08f7b6b4d3fe0c2836aa800839f9cc4f.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f2ec4d51b13d09e1207b852c5d90671b.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c014c5f7c0d581738eee11439eeff46b.png\")
(Substitute the imaginary unit value ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cf3bd74905ce72ea9a2eca4c6e8b84a0.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=497e3ca02116d7188ea6669c409c5a4b.png\")
(Product of two same signs is positive) \ \
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")