How do you solve \r+3=r-3 by the way / is a radical sign

Question

asked Mar 3, 2016 96.2k views

1 Answer

Miedkes · Answer 1 · 2016-03-09T12:31:03+0000

Subtract three from both sides to get:

√(r) =r-6

Square both sides to get:

r^2-12r+36=r

Subtract r to get:

r^2-13r+36=0

Factor to get:
(r-9)(r-4)=0

The solutions to this equation are 9 and 4.