Question

rezolvati in R ecuatia:

√(1-3x)totul la 2=7 totul sub radical

Answer 1

$\displaystyle \sqrt{(1-3x)^2} =7 \\ |1-3x|=7 \\ 1-3x=7 \\ -3x=7-1 \\ -3x=6 \\ x= -\frac{6}{3} \\ x=-2 \\ 1-3x=-7 \\ -3x=-7-1 \\ -3x=-8 \\ x= \frac{8}{3}$