Question

Alaina was asked whether the following equation is an identity:

Answer 1

Answer: yerror she made is at the level of the first step if you want me to show it to you ask me in comment

                                   

Answer 2

Answer: made a step 1 mistake

Step-by-step explanation:

the step is incorrect because the expansion of (x+1)^2 is x^2+2x+1. But since there’s a minus sign before it , all plus signs should be changed to minus.