Question 680947
{{{x - sqrt(x) = 56}}}
{{{sqrt(x) = 56-x}}}
{{{x = (56-x)^2}}}
{{{x = 3136 - 112x + x^2}}}
{{{0 = x^2 - 113x + 3136}}}
*[invoke quadratic "x", 1, -113, 3136 ]
Possible solutions are x = 64 and x = 49
A square root can be negative, 64 and 8 work and so do 49 and -7
Both 56 and 49 are solutions