Question

(x-1)^2=-243

 

Answer 1

`(x-1)^2=-243`

Vì `(x-1)^2 >= 0 \forall x`

`=> (x-1)^2 \ne -243 \forall x`

`=>` PT vô nghiệm.

Answer 2

`(x-1)^2>=0`

`=>` pt vô nó

Answer 3

Ta có: \(\left(x-1\right)^2=-243\)

mà \(\left(x-1\right)^2\ge0>-243\forall x\)

nên \(x\in\varnothing\)

Vậy: \(x\in\varnothing\)