Can someone please explain how to do this?

-4 and 9/10

Step-by-step explanation:

Since everything in parentheses is simplified, you just subtract like terms.

(-1/2)-(1/5)

(5/10)-(2/10)

(-7/10)

9^2 - 9^2 = 0

(-4/5)+(1/10)        (It's a plus sign because the (1/10) was negative and since you are subtracting (two negatives make a positive) it turns positive.

(-8/10) + (1/10)

(-7/10)

(-7/10)^2

(-49/10)

-4 9/10

is this a multiple choice question?

if so it's a and c

36 is the final answer! : )