Question 91671
{{{(x-1)^2=7}}}

take square root on both sides

x - 1 = {{{ "+/-" sqrt(7)}}}

solve this equation 
{{{x = 1 + sqrt(7)}}} or
{{{x = 1 - sqrt(7)}}}



{{{x^2-9x-4=6}}}
{{{x^2-9x-10=0}}}

(x-10)(x+1) = 0

x = 10 or  
x = -1