hala718 Educator since 2008 3,662 answers | Certified Educator Page Citation Share Link sqrt(x^2 - 4x + 4) = 0 Let us rewrite: x^2 - 4x + 4 = (x-2)^2 ==> sqrt(x-2)^2 = 0 ==> x-2 = 0 ==> x =2 Approved by eNotes Editorial Team