![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The inequality is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ffaf038a03527e5bbb51ea4c058182aa.png\")
.
The rational function is cannot multiply with ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7fd9a7e7bb8746b2bd4fc3c3f3e66f57.png\")
, beacause it can be positive or negative.
if ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bb7a633812b588bc50aa65f908843796.png\")
, then ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d021c5123e9c7c6627f00ccb7abe1ccd.png\")
, and when we multiply it, we need to switch the inequality sign.
Therefore, multiply an expression containing ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
in an inequality with out switching the inequality sign is wrong.
Therefore, the student is wrong.
\\
Multiply an expression containing ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
in an inequality with out switching the inequality sign is wrong.
Therefore, the student is wrong.