Question

x-3x в степени 1/2 делить на x-9

Answer 1

ОДЗ х≠9
$frac{x-3x^{1/2}}{x-9}= frac{(x^{1/2})*(x^{1/2})-3x^{1/2}}{(x^{1/2})^2-3^{2}}= frac{x^{1/2}(x^{1/2}-3)}{(x^{1/2}-3)(x^{1/2}+3)}= \ = frac{x^{1/2}}{x^{1/2}+3}$