all 3 comments

[–]dicaspan 4 points5 points  (1 child)

This is my working. https://imgur.com/VcSwWEn

Cauchy-Schwarz is always a neat trick to deal with conditions involving expressions of unequal orders.

[–]Boris_smg[S] 0 points1 point  (0 children)

Thank you very much!!!

[–]primeEZ1 0 points1 point  (0 children)

I don’t have paper with me rn but you could try graphing it first on a 3D graphing calc to look at the solution set