cho biểu thức  

A=\((\dfrac{3}{\sqrt{x}-1}+\dfrac{\sqrt{x}-3}{x-1})\div\dfrac{1}{\sqrt{x}-1}\)

a, tìm điều kiện xác định

b,tìm x, A =3

tìm x biết 

     a,    \(\sqrt{(x+3)^2}\)=12

  b,            \(\sqrt{25x-25}-\sqrt{9x-9}\)=10

A. google.com.vn

I.rewrite the following sentences in reposter speech

1,"we"I go on a picnic tomorrow they said

2"I can do this exercise"ba said

3,'I must finsish this work in time 'lan said

4,'ther flower are beautiful'my mother said

5;'I like math 'he said

6, she said 'they are playing soccer'

1, comprehend reading materials

    Determine the problems you ' re facing

2, stay calm with others 

    Feel sympathy for others

3, follow diections or rules

    Listen to others

    Ask for help