(x − 3)2 = 5

  (x− 3)2 − 5 = 0
     2  (√ -)2
(x − 3) −    5  = 0

(x − 3)2 = 5 (x− 3)2 − 5 = 0 2 (√ -)2 (x − 3) − 5 = 0