Giups minhf voiws
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HP
5 tháng 9 2021
a, \(P=\left(\sqrt{x}-\dfrac{x+2}{\sqrt{x}+1}\right):\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}-\dfrac{\sqrt{x}-4}{1-x}\right)\)
\(=\left(\dfrac{x+\sqrt{x}}{\sqrt{x}+1}-\dfrac{x+2}{\sqrt{x}+1}\right):\left[\dfrac{\sqrt{x}\left(\sqrt{x}-1\right)}{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}+\dfrac{\sqrt{x}-4}{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}\right]\)
\(=\dfrac{\sqrt{x}-2}{\sqrt{x}+1}:\dfrac{x-4}{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}\)
\(=\dfrac{\sqrt{x}-2}{\sqrt{x}+1}.\dfrac{\left(\sqrt{x}+1\right)\left(\sqrt{x}-1\right)}{\left(\sqrt{x}+2\right)\left(\sqrt{x}-2\right)}\)
\(=\dfrac{\sqrt{x}-1}{\sqrt{x}+2}\)
9 tháng 8 2018
Rewrite the sentence ,use the word in parentheses:
There are two fridges,a table,four chairs in Thuong's kitchen. - ............Thuong's kitchen has 2 fridges, a table, four chairs..............
9 tháng 8 2018
=> Thuong's kitchen has two fridges , a table , four chairs .
NT
12
VL
15
TA
13 tháng 12 2021
1 The Temple of Literature is about 10 minutes away from Hoan Kiem Lake
2 There are five courtyards
3 It''s used for street signs of Ha Noi
4 We can find the stone tablets above tortoise backs with thenames of doctors in the third courtyard
EX4
1 : My town was visited by hundreds of tourists last year
giups minhf
E
24 tháng 2 2020
|x+1|-x+2=3-x
|x+1| = 3 - x - 2 + x
|x+1| = 1
\(\Rightarrow\orbr{\begin{cases}x+1=1\\x+1=-1\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=0\\x=-2\end{cases}}\)
Vậy x \(\in\left\{0;-2\right\}\)
Hok tốt !
24 tháng 2 2020
\(|x+1|-x+2=3-x\)
\(\Leftrightarrow|x+1|-x+2-3+x=0\)
\(\Leftrightarrow|x+1|-1=0\)
\(\Leftrightarrow|x+1|=1\)
\(\Leftrightarrow\orbr{\begin{cases}x+1=1\\x+1=-1\end{cases}\Leftrightarrow\orbr{\begin{cases}x=0\\x=-2\end{cases}}}\)