Cho pt ẩn x : \(\dfrac{x+a}{x+3}+\dfrac{x-3}{x-a}=2\)
a, Giải pt với a = -1
b, Giải pt với a = 2
c, Giải pt với a = 3
d, Tìm các giá trị của a biết phương trình nhận x=1 làm nghiệm
-Thank you-

Cạnh của hình vuông dài số cm là :

  20 : 4 = 5 ( cm )

Đáp số : 5 cm

zzz Chúc học giỏi zzz

Cạnh của hình vuông là :

      20 : 4 = 5 ( cm )

           Đáp số : 5 cm

Bt: Giải các pt sau:
a, \(\dfrac{x+3}{x+1}\) + \(\dfrac{x-2}{x}\)=\(\dfrac{2\left(x^2+x-1\right)}{x\left(x+1\right)}\)
b, \(\dfrac{2}{x-2}-\dfrac{x}{x+3}=\dfrac{5x}{\left(x-2\right)\left(x+3\right)}-1\)
c, \(\dfrac{1}{x^2+x+1}-\dfrac{1}{x^2-x+1}=\dfrac{1-2x}{x^4+x^2+1}\)
d, \(\dfrac{3x-1}{x-1}-\dfrac{2x+5}{x+3}+\dfrac{4}{x^2+2x-3}=1\)
e, \(\left(x+1\right)\left(x+2\right)\left(x+4\right)\left(x+5\right)=40\)

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We can leave............................................................................on your coat
2. If you don't start training soon, you won't win the championship. (unless)
You won't win the championship...................................training soon.
3. It was smaller than other phone in the shop. (smallest)
It.................................................................................................................
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5. It was such a good class that they decided to go regularly. (so)
The class................................................................................................