The expression is .
Square Root of a Number: If b2 = a, then b is a square root of a.
(The negative square root of 361 is 19)
The value of the expression is 19.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f194b09959d45865dcd16b5cfd02129d.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e351c8ce4909706e80ec9b2df3d8e9cb.png\")
(The negative square root of 361 is 19)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")