A Nice Functional Equation [f(x+y)=f(x)+f(y)+2xy]

Join this channel to get access to perks:→ https://bit.ly/3cBgfR1
My merch → https://teespring.com/stores/sybermat...
Follow me →   / sybermath  
Subscribe → https://www.youtube.com/SyberMath?sub...
Suggest → https://forms.gle/A5bGhTyZqYw937W58
If you need to post a picture of your solution or idea:
https://twitter.com/intent/tweet?text...
#ChallengingMathProblems #FunctionalEquations

EXPLORE 😎:
Simplifying a Complicated Algebraic Expression:    • Simplifying a Complicated Algebraic Expres...  

Solving a Polynomial System in Two Ways:    • Solving a Polynomial System in Two Ways  

A Trigonometry Challenge:    • A Trigonometry Challenge  

PLAYLISTS 🎵 :
Number Theory Problems:    • Number Theory Problems  

Challenging Math Problems:    • Challenging Math Problems  

Trigonometry Problems:    • Trigonometry Problems  

Diophantine Equations and Systems:    • Diophantine Equations and Systems  

Calculus:    • Calculus