Rút gọn \(A = \frac{{\sqrt {25 + x – 10\sqrt x } }}{{\sqrt {25 + x + 10\sqrt x } }}\)với \(x \ge 25\) A \(A = \sqrt x + 2\) B \(A = 1\) C \(A = \frac{{\sqrt x – 5}}{{\sqrt x + 5}}\) D \(A = – \frac{{\sqrt x – 5}}{{\sqrt x + 5}}\)
Rút gọn \(A = \frac{{\sqrt {25 + x – 10\sqrt x } }}{{\sqrt {25 + x + 10\sqrt x } }}\)với \(x \ge 25\) A …