Răspuns :
[tex] {(x - 3)}^{2} = 4[/tex]
[tex] |x - 3| = \sqrt{2} [/tex]
[tex]x - 3 = 2 = > x = 5[/tex]
[tex]sau \: \: \: x - 3 = - 2 = > x = 1[/tex]
Răspuns:
[tex](x - 3)^{2} = x^{2} - 6x + 9 [/tex]
[tex]x ^{2} - 6x + 9 = 4 \: = > x^{2} - 6x + 5 = 0[/tex]
Delta = (-6)^2 - 4×1×5 = 36 - 20 = 16 =>rad.delta = 4
x1 = (6-4)/2 = 1
x2 = (6+4)/2 = 5
[tex]x^{2} - 6x + 5 = (x - 1)(x - 5)[/tex]