datgirl123

2+ Year Member
May 25, 2016
25
4
Status
Pre-Dental
hey there guys,

i have a question in QR in dat destroyer question 38.

solve for x : radical x+5 = x -1

i solved it and got the roots as 4 and -1. i understand we have to plug it in. why is 4 the only answer? -1 could work. the square root of 4 could be + and - 2.

thanks!
 

Crithu

2+ Year Member
Sep 24, 2014
74
28
Status
Pre-Dental
hey there guys,

i have a question in QR in dat destroyer question 38.

solve for x : radical x+5 = x -1

i solved it and got the roots as 4 and -1. i understand we have to plug it in. why is 4 the only answer? -1 could work. the square root of 4 could be + and - 2.

thanks!
The square root of -1 is i, an imaginary number.