Question

\(\sqrt{x+1}+2\)=0

\(3\sqrt{x+1}=40\)

Answer 1

\(\sqrt{x+1}+2=0\)

\(\sqrt{x+1}=-2\)

\(\Rightarrow x\in\varnothing\) vì \(x\ge0\)

\(3\sqrt{x+1}=40\)

\(\sqrt{x+1}=\frac{40}{3}\)

\(x+1=\frac{1600}{9}\)

\(x=\frac{1591}{9}\)