Question 105556
{{{(3-2(sqrt(7)))*(3+2(sqrt(7)))=3^2-(2 (sqrt(7)))^2}}}
{{{(3-2(sqrt(7)))*(3+2(sqrt(7)))=9-((2^2)*((sqrt(7)))^2)}}}
{{{(3-2(sqrt(7)))*(3+2(sqrt(7)))=9-(4*7)}}}
{{{(3-2(sqrt(7)))*(3+2(sqrt(7)))=9-28}}}
{{{(3-2(sqrt(7)))*(3+2(sqrt(7)))=-19}}}


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