Question 49148
{{{a^2 + b^2 = c^2}}}
{{{(2x)^2 + (x)^2 = 10^2}}}
{{{4x^2 + x^2 = 100}}}
{{{5x^2 = 100}}}
{{{x^2 = 20}}}
{{{x = 2*sqrt(5)}}}