Answer:
Emanuel did a mistake in her first step.
Step-by-step explanation:
The given expression is
Emanuel solve this problem but she did a mistake in her first step. She distributes negative sign with 1 and 2 both which is incorrect. We can write negative sign with either 1 or 2 but not both.
Correct steps are:
Step 1:
Step 2:
Step 3:
Therefore, she did a mistake in her first step.