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Rezolvati in R ecuatia:
√(1-3x)²=7


Răspuns :

[tex] \sqrt{(1-3x) ^{2} } =7 \\ |1-3x|=7 \\ 1.) 1-3x=7 \\ -3x=6 \\ x=-2 \\ 2.)1-3x=-7 \\ -3x=-8 \\ x= \frac{8}{3} [/tex]