Найдите область определения функции y=sqrt(x^2-9)-sqrt(x-3)

[latex]y=sqrt{x^2-9}-sqrt{x-3}\\OOF:; ; left { {{x^2-9 geq 0} atop {x-3 geq 0}} ight. ; left { {{(x-3)(x+3) geq 0} atop {x geq 3}} ight. ; left { {{xin (-infty ,-3, ]cup [, 3,+infty )} atop {xin [, 3,+infty )}} ight. \\xin [3,+infty )[/latex]