To find the one-sided limit $$\lim_{x\to 3^-}\frac{\sqrt{9 - x^2}- \sqrt{3 - x}}{3 - x}$$ we should multiply numerator and denominator by the expression

After simplifying and cancelling out a common factor from numerator and denominator we find that the limit is

Use INF to denote $\infty$ and MINF to denote $-\infty$.