$\left(x-10\right)^2$\left(x-10\right)^2

$\left(x-10\right)\left(x+10\right)$\left(x-10\right)\left(x+10\right)

$\left(x-50\right)^2$\left(x-50\right)^2

$\left(x-50\right)\left(x+50\right)$\left(x-50\right)\left(x+50\right)