SOLUTION: I have been working on equations containing radicals. I need help on the equations (r(y-9)=(r(y)-1) {{{sqrt(y-9)=sqrt(y)-1}}}

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Question 734315: I have been working on equations containing radicals.
I need help on the equations (r(y-9)=(r(y)-1)
sqrt%28y-9%29=sqrt%28y%29-1
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28y-9%29=sqrt%28y%29-1

Square both sides. Simplify. Square both sides again and simplify; solve for y.

Actually, this equation will not really require going formally through the second squaring phase because simplification will be very uncomplicated.

From the first squaring step:
y-9=y-2sqrt%28y%29%2B1
-10=-2sqrt%28y%29
sqrt%28y%29=5
highlight%28y=25%29