Question 227965
Solve for x?
{{{x-9sqrt(x)+20 = 0}}} Add {{{9sqrt(x)}}} to both sides.
{{{x+20 = 9sqrt(x)}}} Now square both sides.
{{{x^2+40x+400 = 81x}}} Subtract {{{81x}}} from both sides.
{{{x^2-41x+400 = 0}}} Factor the trinomial.
{{{(x-25)(x-16) = 0}}} so...
{{{x = 25}}} or {{{x = 16}}}