Question 122858
Solve for d:
{{{sqrt(d-12) = sqrt(d)-2}}} Square both sides.
{{{d-12 = d-4sqrt(d)+4}}}  Subtract d from both sides.
{{{-12 = -4sqrt(d)+4}}} Subtract 4 from both sides.
{{{-16 = -4sqrt(d)}}} Divide both sides by -4
{{{4 = sqrt(d)}}} Finally, square both sides.
{{{16 = d}}}