How do you solve # (x-7)^2=9#?

Question

4856 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-04-07T10:03:40

#x = 10, 4#

#(x - 7)^2 = 9#

Square root both sides to get rid of the #()^2#. This gives two answers: #3# and #-3#. Begin by solving with the answer #3#.

#x - 7 = 3#

Add #7# to get rid of the #-7#

#x = 10#

Now for #-3#,

#x - 7 = -3#
#x = 4#