## Yazzy2041 Group Title I need help with this problem 2sqrt (-4)-94 2 years ago 2 years ago

1. beknazar23 Group Title

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

2. Yazzy2041 Group Title

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

3. Yazzy2041 Group Title

|dw:1345597004779:dw|

4. beknazar23 Group Title

|dw:1345597202428:dw|

5. Yazzy2041 Group Title

Where did the sprt(-1) come from ?

6. beknazar23 Group Title

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

7. Yazzy2041 Group Title

I still do not understand

8. Yazzy2041 Group Title

Write the following expressions in standard form.

9. beknazar23 Group Title

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

10. hawkfalcon Group Title

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

11. Yazzy2041 Group Title

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

12. hawkfalcon Group Title

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

13. hawkfalcon Group Title

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

14. hawkfalcon Group Title

$4i - 94$

15. Yazzy2041 Group Title

thanks

16. hawkfalcon Group Title

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