a) \(\Rightarrow A=\dfrac{\left(\sqrt{x}-1\right)^2}{\sqrt{x}-1}+\dfrac{\sqrt{x}\left(\sqrt{x}+1\right)}{\sqrt{x}+1}\)
\(\Rightarrow A=\sqrt{x}-1+\sqrt{x}\)
\(\Rightarrow A=2\sqrt{x}-1\)
b) \(\Rightarrow A=2.4-1=7\)
a) \(A=\dfrac{\left(\sqrt{x}-1\right)^2}{\sqrt{x}-1}+\dfrac{\sqrt{x}\left(\sqrt{x}+1\right)}{\sqrt{x}+1}=\sqrt{x}-1+\sqrt{x}=2\sqrt{x}-1\)
b) \(A=2\sqrt{x}-1=2\sqrt{16}-1=2.4-1=7\)