Alaina was asked whether the following equation is an identity:
2 answers:
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: 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.
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