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\(Ta \) \(có : \) \(x. ( y +2 ) - y = 3\)
\(\Rightarrow\)\(x. ( y + 2 ) - y = 1 + 2\)
\(\Rightarrow\)\(x. ( y + 2 ) - y - 2 = 1 \)
\(\Rightarrow\)\(x. (y + 2 ) - ( y + 2 )=1\)
\(\Rightarrow\)\((y+ 2 )(x - 1 ) = 1\)
\(Ta\) \(Lập \) \(Bảng :\)
\(x - 1\) | \(1\) |
\(y + 2\) | \(1\) |
\(x\) | \(2 \) |
\(y\) | \(- 1\)\(( loại )\) |
\(Vậy : Không \) \(có \) \(giá\) \(trị\) \(của\) \(x,y\)
Trl :
x( x - 5) - 2( x - 5) = 0
( x - 5)( x - 2) = 0
\(\Rightarrow\orbr{\begin{cases}x-5=0\\x-2=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=5\\x=2\end{cases}}\)
Hok tốt nhé :)
\(x\left(x-5\right)-2\left(x-5\right)=0\)
\(\left(x-2\right)\left(x-5\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-2=0\\x-5=0\end{cases}\Rightarrow\orbr{\begin{cases}x=2\\x=5\end{cases}}}\)
Vậy \(x=2;x=5\)
Ta có :
\(\frac{204204}{217217}=\frac{204204:1001}{217217:1001}=\frac{204}{217}\)
\(\frac{414141}{494949}=\frac{414141:10101}{494949:10101}=\frac{41}{49}\)
\(\frac{171171171}{180180180}=\frac{171171171:9009009}{180180180:9009009}=\frac{19}{20}\)
1 What an interesting film it is!
2 How fine the weather is!
3 My bathroom has a sink, a tub and a showers
4 Mrs Na grows vegetables and raises cattles on her farm
5 Which is the most suitable apartment for your family
1.What an interesting film it is!
2.How fine the weather is!
3.My bathroom has a sink, a tub and a showers.
4.Mrs Na grows vegetables and raises cattles on her farm.
5.Which is the most suitable apartment for your family.