The expression is .
The product of two numbers with same signs is positive.
(Multiply: )
The product of the expression is .
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7814925b4fb95a6c582b4df636ad2d7e.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=41b67cc84cd1ff16785fb804c82857bb.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
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.