How do you write the Vertex form equation of the parabola #y=x^2-1 #?
The Vertex form is derived by the process called 'completing the square'.
Assumption: You do not need a step by step explanation.
If you do then see the example: https://socratic.org/s/aEP7wZdu
Using a place holder write as:
Thus we have:
Thus the vertex is at
This is as expected because we have lowered by 1 the standard graph of