Can someone explain this to me?

Question

10+2#sqrt(x) #=0

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Answer 1 · 2018-05-16T21:50:50

#x=25#

First you subtract 10 from both sides...
#2sqrtx#=-10

Next you divide both sides by 2...
#sqrtx#=-5

Finally you square both sides...
#(sqrtx)^2#=#(-5)^2#

And...
#x=25#