Question

2 x square -8 y square =0

Answer 1

$2x^2-8y^2=0$

$2({x}^{2}-4{y}^{2})=0$

$2({x}^{2}-{(2y)}^{2})=0$

$2(x+2y)(x-2y)=0$

$x=\pm 2y$