Question 631633
{{{(x-1)^2-9=0}}}
{{{(x-1)^2=9}}}
{{{sqrt((x-1)^2)=sqrt(9)}}}
{{{sqrt((x-1)(x-1))=sqrt((3)(3))}}}
{{{x-1=3}}}
{{{x=3+1}}}
{{{x=4}}}


Check
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{{{(x-1)^2-9=0}}}
Put {{{x=4}}}

{{{(4-1)^2-9=0}}}

{{{(3)^2-9=0}}}

{{{9-9=0}}}

{{{0=0}}}