If the lines $2x+y+5=0$  and  $2px+y+1=0$ are the asymptotes of a hyperbola, the possible value of  $p$ are

(Where R  is set of real numbers)
Equation of hyperbola can be written as  $(2x+y+5)(2px+y+1)=\lambda$ This equation represents a hyperbola if  $h^2>ab$
$\Rightarrow {(1+p)}^2>4p$
$\Rightarrow {(1-p)}^2>0$
$\Rightarrow p\in R-\left\{1\right\}$