1. boomerang285

$\left( -5-\sqrt{-9} \right)^{2}$

2. rvgupta

16+i10*9^1/2

3. littlepixie99

well what is -5 *-5? remember negative times negative is a positive then what is rt-9^2?

4. boomerang285

25 and 3 right?

5. boomerang285

and rvgupta, i come up with that answer too but its not one of my multiple choice options

6. littlepixie99

25 is correct, but if you sq rt a number and then sq it again you get the original number

7. littlepixie99

so you've rooted it but not re-squared it

8. boomerang285

so it is 9?

9. boomerang285

16

10. littlepixie99

is that an option?

11. boomerang285

for some reason i keep coming up with 16-10i$\sqrt{9}$

12. boomerang285

there is 16 + 30i

13. littlepixie99

where did the 10i come from?

14. boomerang285

i am not really sure... i know i worked it out wrong, and 10i isnt even an option....

15. boomerang285

yes

16. littlepixie99

think of it this way -5*-5 -rt9*-rt9 -5*-rt9 -5*-rt9 and add all those together

17. estudier

16+30i