ojrules959 ojrules959
  • 16-03-2018
  • Mathematics
contestada

Which strategy is the most appropriate strategy to solve
(x−1)
2
=9
?

Respuesta :

jdoe0001 jdoe0001
  • 16-03-2018
[tex]\bf (x-1)^2=9\impliedby taking~~\sqrt{\qquad }~~\textit{to both sides} \\\\\\ \sqrt{(x-1)^2}=\sqrt{9}\implies x-1=\pm \sqrt{9}\implies x-1=\pm 3 \\\\\\ x=\pm 3+1\implies x= \begin{cases} 4\\ -2 \end{cases}[/tex]
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