Triangle numbers and Sum of odd numbers | Visual proof algebra

Sum of the 2 triangle numbers and odd numbers

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Music Credit: LAKEY INSPIRED
Track Name: "Blue Boi"
Music By: LAKEY INSPIRED @
Original upload HERE -
Official "LAKEY INSPIRED" YouTube Channel HERE -
License for commercial use: Creative Commons Attribution 3.0 Unported "Share Alike" (CC BY-SA 3.0) License.
Full License HERE -
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