5.
甲、乙两位同学对代数式\(\dfrac{a-b}{\sqrt{a}+\sqrt{b}}(a > 0,b > 0)\),分别作了如下变形:
甲:\(\dfrac{a-b}{\sqrt{a}+\sqrt{b}}=\dfrac{(a-b)(\sqrt{a}-\sqrt{b})}{(\sqrt{a}+\sqrt{b})(\sqrt{a}-\sqrt{b})}=\sqrt{a}-\sqrt{b}\)
乙:\(\dfrac{a-b}{\sqrt{a}+\sqrt{b}}=\dfrac{(\sqrt{a}-\sqrt{b})(\sqrt{a}+\sqrt{b})}{\sqrt{a}+\sqrt{b}}=\sqrt{a}-\sqrt{b}\)
关于这两种变形过程的说法正确的是\((\) \()\)