B = \(\left( \frac{x+\sqrt{x}}{x+2\sqrt{x}-3} + \frac{3}{x-\sqrt{x}} \right) \cdot (x-1)\) a) \(x \in \mathbb{R}, b) \text{Tìm } m\) d) \( \sqrt{x} \in B \)?

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B = \(\left( \frac{x+\sqrt{x}}{x+2\sqrt{x}-3} + \frac{3}{x-\sqrt{x}} \right) \cdot (x-1)\)

a) \(x \in \mathbb{R}, b) \text{Tìm } m\)

d) \( \sqrt{x} \in B \) ?