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x la puterea a doua egal cu361...va rogggg

Răspuns :

[tex]x^{2}=361 \\ x=\sqrt{361}=19 \\ x=-\sqrt{361}=-19[/tex]
solutia 1:
x=19
solutia 2:
x=-19
[tex]x^2= 361 \\ x= \sqrt{361 } \\ x=19 \\ x=- \sqrt{361} \\ x=-19 \\ S=\{-19;19\}[/tex]