👤

Radical x patrat - 8x +16 ( asta cuprinde tot radicalul ) =3

Răspuns :

[tex]\sqrt{x^2-8x+16} = \sqrt{(x-4)^2} = |x-4|[/tex]

Si:

[tex]|x-4| = 3 \Rightarrow x-4= \pm 3\\\Rightarrow x=3+4 = 7\\sau\\x=-3+4=1[/tex]