Question

ac giúp e giải với ạ e cảm ơn ac

Answer 1

1: \(P=\dfrac{x-3\sqrt{x}+2-x-4\sqrt{x}-3-x-5}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}\)

\(=\dfrac{-x-7\sqrt{x}-6}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}=\dfrac{-\sqrt{x}-6}{\sqrt{x}-2}\)

2: Để P>-1 thì P+1>0

\(\Leftrightarrow\dfrac{-\sqrt{x}-6+\sqrt{x}-2}{\sqrt{x}-2}>0\)

\(\Leftrightarrow\sqrt{x}-2< 0\)

hay 0<x<4