Question

Tìm X biết 

A,\(\sqrt{x-3}\)     B,\(2\sqrt{x-1}+3\sqrt{x-1}=10\)  C, \(\sqrt{\left(x-1\right)^2}=3\)                                    

Answer 1

`a, x >= 3`

`b, => 5sqrt(x-1) = 10`

`=> sqrt(x-1) = 2`

`=> x = 3`

`c, => x- 1 = 3 ( x >= 1)`

`=> x = 4`.

hoặc

`=> 1 - x = 3 ( x <= 1)`

`=> x = -2`

 

Answer 2

`a, x >= 3`

`b, => 5sqrt(x-1) = 10`

`=> sqrt(x-1) = 2`

`=> x = 5`

`c, => x- 1 = 3 ( x >= 1)`

`=> x = 4`.

hoặc

`=> 1 - x = 3 ( x <= 1)`

`=> x = -2`