Question Number 99804 by bramlex last updated on 23/Jun/20
$${Determine}\:{x},{y}\:\in\:\mathbb{Z}\:{such}\:{that}\: \\ $$$$\mathrm{1}+\mathrm{2}^{{x}} \:+\mathrm{2}^{\mathrm{2}{x}+\mathrm{1}} \:=\:{y}^{\mathrm{2}} \: \\ $$
Commented by Rasheed.Sindhi last updated on 23/Jun/20
$${Q}#\mathrm{97746} \\ $$
Commented by harckinwunmy last updated on 23/Jun/20
$$\mathrm{can}\:\mathrm{you}\:\mathrm{working}\:\mathrm{please} \\ $$
Commented by prakash jain last updated on 23/Jun/20
97746 has the workings.