Question 5 is B
Question 9 is C
Given,
The expression is:

By using the middle term splitting method,

Hence, the factor is (x-(7+sqrt(33)/4)) (x+(7+sqrt(33)/4)).
I don’t know spanish sorry
Answer:
24.30 Difference, sale price 56.70
Step-by-step explanation:
30% off 81.00 is 56.70
The difference is 24.30