anonymous 4 years ago I need help with this problem 2sqrt (-4)-94

1. anonymous

4i-94 which i = sqrt(-1)

2. anonymous

I do not understand how to work the problem out at all .

3. anonymous

|dw:1345597004779:dw|

4. anonymous

|dw:1345597202428:dw|

5. anonymous

Where did the sprt(-1) come from ?

6. anonymous

it's just assignment, we guess it is equal to variable "i" kind of abstraction, mathematicians use

7. anonymous

I still do not understand

8. anonymous

Write the following expressions in standard form.

9. anonymous

you can read it in wikipedia: http://en.wikipedia.org/wiki/Imaginary_number

10. hawkfalcon

@Yazzy2041 $-1 = i^2$ Thats what he's saying

11. anonymous

I do not understand the breakdown this is my first time doing this @hawkfalcon

12. hawkfalcon

It's okay:) Thanks for fanning me:P

13. hawkfalcon

$2\sqrt (-4)-94$ $2 i \sqrt (4)-94$ $2i2-94$ How far do you need to go?

14. hawkfalcon

$4i - 94$

15. anonymous

thanks

16. hawkfalcon

No problem, make sense? It it has a negative value in the radical, you make it imaginary:P