Hellow guys, Welcome to my website, and you are watching 28. (1+x^4)dy+x(1+4y^2)dx=0, y(1)=1. Variables separables. Alexander Estrada. and this vIdeo is uploaded by alexander estrada at 2021-03-15T17:56:02-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.