Question
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
Thank you
Solve each equation and check for extraneous solutions.
[SQRT(x - 3)] - 7=0
2[SQRT(w + 4)]=5
[SQRT(x)]=-2
Answers
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
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
Sal
What would i do with the 2 ?
drwls
Square it, or first divide both sides of the equation by 2 and then square 5/2 on the right side.