Solve the equation (x-1)^{2}=9

Question
Equations and inequalities
Solve the equation $$\displaystyle{\left({x}-{1}\right)}^{{{2}}}={9}$$

2021-04-20

Take the square root of both sides of he equation:
$$x-1=\pm3$$
Add 1 to both sides of the equation:
$$\displaystyle{x}={1}+\pm{3}$$ or -2

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