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Rezolvati in R ecuatia:
(1-3x)² totul sub radical =7


Răspuns :

[tex]\sqrt{(1-3x){^2}}=7 \\ 1-3x=7 \\ 3x=1-7 \\ 3x=-6 \\ x=\frac{-6}{3} \\ x=-2[/tex]