The points are .
Let
(Apply determinant formula: )
(Substitute the points)
The equation of the line is 2x + 2y = 0.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6ab8a6a85f103c8eca8e4e97b829f44f.png\")
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)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=57079d9d81611c49b9cedba37feedf31.png\")
(Substitute the points)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=44cbcfb1b3528fb63a60af3c55eeff5b.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=18d7aafdfe4db50525dedb3a3d822586.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")