Melinda derives the quadric formula from the following equation, and her first four steps are shown below.

The equation:

where a ≠ 0

Melinda's steps :

Step 1 :

Step 2 :

Step 3 :

Step 4 :

Are Melinda's fisrt four steps correct?
*● if her steps are correct, explain how you know.
*●if her steps are incorrect, name the mistake(s) she made and explain how you know