`3^2 + (11-10x)=0`
$\Rightarrow$ `9 + (11-10x)=0`
$\Rightarrow$ `11 - 10x = 0-9`
$\Rightarrow$ `11-10x = -9`
$\Rightarrow$ `10x=11 - (-9)`
$\Rightarrow$ `10x=11 +9`
$\Rightarrow$ `10x=20`
$\Rightarrow$ `x=20 : 10`
$\Rightarrow$ `x=2`
$\text{Vậy x = 2}$
$\Rightarrow$ $\text{Chọn B}$