Me with this math problem i will give brainliest for the right answer.

show your work**

The answer is 9x-4.

Step-by-step explanation:

First calculate the area of the backyard. This is 13x-1. Then multiply the area of the patio so multiply x +3 by x+ 3. The answer to this is 4x+3. Next subtract the area of the patio from the area of the backyard. The answer is 9x-4.

3)i

4)-i

Step-by-step explanation:

rewrite i^17

by factoring

rewrite

i^4 as 1

(1^4)i

one to any power is 1

1i. <- multiply by 1

i

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follow those steps to get to the 2nd answer