Can someone please answer this i really need the step by step solution please thank you

-2

Step-by-step explanation:

on question A the answer is going down by two but question b im not sure on

Step-by-step explanation:

(3)

3 - 8 = -5

-2 - 3 = -5

so, I think the common difference is - 5

(4)

7² - 1

7² + 1

= 49 - 1

49 + 1

= 48

50

23

25

And that's the answer I think.

BRAINLIEST again would be advantageous❤︎

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.