Originally Posted by

**bobbyboy1111** Please check the following complex numbers and let me know if they are correct. If they are not, please point out the mistake/s I am making and what to fix You will be thanked!

Express in simplest form, in terms of i.

5. SQRT(-243)

SQRT(-243) = SQRT(81*3*(-1)) = SQRT(81)SQRT(3)SQRT(-1) = 9SQRT(3i)

6. 2[SQRT(-81)] - 2[SQRT(-100)]

2(9i) -2[SQRT(-100)]

2(9i) -2(10i)

18i - 20i

-2i

7. (2i - 5)/(i + 1)

-5 + 2i/i + 1

-5 + 2i/ 1 + i

-5 + 2i/ 1 + i * 1 - i/1 - i

(-5 + 2i)(1 - i)/2

- 3 + 7i/2

Thanks!!!!!