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September 18, 2014

September 18, 2014

Posted by **Bart** on Wednesday, October 24, 2012 at 1:00pm.

I.e.: x^2=4

x=2,-2

For: x^2=-4

x=2i or -2i ?

(Is there a 2i and -2i, like for real numbers?)

- Algebra 2 -
**Damon**, Wednesday, October 24, 2012 at 1:37pmtry it

(2i)^2 = 4 i^2 = 4(-1) = -4

(-2i)^2 = 4 i^2 = 4(-1) =-4 sure enough

In other words, yes

- Algebra 2 -
**Bart**, Wednesday, October 24, 2012 at 1:46pmThank you!

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