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

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

$4\left(x-10\right)^2$4\left(x-10\right)^2

$4\left(x-10\right)\left(x+10\right)$4\left(x-10\right)\left(x+10\right)