Harry solved a quadratic equation. His work is shown below.
**In which step did Harry make an error?**
$\begin{align}
(x-5)^2+6&=42
\\\\
(x-5)^2&=36&\text{Step }1
\\\\
x-5&=6&\text{Step }2
\\\\
x&=11&\text{Step }3
\end{align}$
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