Asked by Sal

I would appreciate your help with this.


Thank you



Solve each equation and check for extraneous solutions.

[SQRT(x - 3)] - 7=0

2[SQRT(w + 4)]=5


[SQRT(x)]=-2


Answered by drwls
SQRT(x - 3) - 7 = 0
Change it to
SQRT(x - 3) = 7
and then square both sides, to get
x - 3 = 49
x = 52
x must be >3 and sqrt (x-3) must be positive (since is equals 7), so there are no other solutions.

Square both sides of the second equation and proceed similarly
Answered by Sal
What would i do with the 2 ?
Answered by drwls
Square it, or first divide both sides of the equation by 2 and then square 5/2 on the right side.
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