The expression is .
Apply distributive property: a (b + c) = ab + ac.
(Distribute 4)
(Multiply: )
The solution of .
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0b6e01468d8394d608ba6349a3de2a6c.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=56fca56623a92c6c482fcd41a0ebec4f.png\")
(Distribute 4)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4c9a5a856b7bc65ebc924266cd78ea3d.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=54dd98413445787d195539798ccb5b13.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a289a6f477e9b1d831ae4ab9e3af05ff.png\")
.