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Mathematics 7 Online
OpenStudy (iwanttogotostanford):

S

OpenStudy (iwanttogotostanford):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

The stuff under the radical can't be negative. So force `x+2` to be either 0 or positive,ie, \[\Large x+2 \ge 0\]

jimthompson5910 (jim_thompson5910):

solve that for x

OpenStudy (iwanttogotostanford):

would it be "b"?

OpenStudy (iwanttogotostanford):

@jim_thompson5910

OpenStudy (iwanttogotostanford):

please help ASAP

jimthompson5910 (jim_thompson5910):

Subtract 2 from both sides \[\Large x+2 \ge 0\] \[\Large x+2{\color{red}{-2}} \ge 0{\color{red}{-2}}\] \[\Large x \ge -2\] make sense?

OpenStudy (iwanttogotostanford):

wow! That explanation helped a lot. What about the next one?

jimthompson5910 (jim_thompson5910):

graph each equation using a tool like desmos https://www.desmos.com/calculator then use the vertical line test

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