Question

Rút gọn:

\(A=\left(\frac{3}{\sqrt{x}+5}+\frac{20-2\sqrt{x}}{x-25}\right).|x-4|\)

Answer 1

(ĐK: \(x\ge0;x\ne25\))

\(A=\left(\frac{3\left(\sqrt{x}-5\right)+20-2\sqrt{x}}{x-25}\right).\left|x-4\right|\)

\(A=\left(\frac{\sqrt{x}+5}{x-25}\right)\left|x-4\right|=\frac{\left|x-4\right|}{\sqrt{x}-5}\)

Answer 2

\(\left(ĐK:x\ge0;x\ne25\right)\)

\(A=\left(\frac{3\left(\sqrt{x}-5\right)+20-2\sqrt{x}}{x-25}\right).|x-4|\)

\(A=\left(\frac{\sqrt{x}+5}{x-25}\right)|x-4|=\frac{|x-4|}{\sqrt{x}-5}\)

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