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=421f75cf632d4f50cc67a1335ee04b54.png\")
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(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8f71a2581c65dfa0a1135d76c3cea1eb.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
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.