I don't know about the first one but for the second one:

Answer:
23.2/20
Step-by-step explanation:
Answer:
a) 27. b) 8/3
This is your answer ☺️☺️☺️
The given expression is :
2xx+3-5(x-2)
We know that, 

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.