Respuesta :

we have

[tex](x-1)^2=9[/tex]

Solve the quadratic equation

[tex]\begin{gathered} (x-1)^2=9 \\ \text{take square root both sides} \\ (x-1)=\pm3 \\ x=1\pm3 \\ x_1=1+3=4 \\ x_2=1-3=-2 \end{gathered}[/tex]

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