Finding the turning point using Completing the Square

How to find the turning point of a curve using the simple method of completing the square

[livhayes]

this was actually more helpful than my teachers thx

[adaonyenso]

The way i learned in 1 minute what my teachers have been tryna teach me for months 💀, thanks this was helpful <3

[tdm]

Good Just the sign of the square outside the Bracket should be the sign on the bracket