Posted by Tara on Thursday, August 16, 2012 at 12:08pm.
I'm confused about this math stuff:/
it's my first time trying these algebra problems.
I'm trying to go by the teacher's examples.
Can You tell me if these are right:p?
3.4+√-20 / 2
another way, in polar form:
so (2+4i)/(3-i)=sqrt20/sqrt10 @ (arctan2-arctan-1/3)=sqrt2 @(1.11rad-(-.321))
= sqrt2 @1.43rad=sqrt2 @ 81.9 deg
Now converting this (only to compare with the above)
= sqrt2 (cos81.9+isin81.9)
and the above is .2+i1.40
I rounded the angles on the arctan conversions...
= 34+14i√15i ????
3.4+√-20 / 2
4/2+1/2 i sqrt20=2+.5i*sqrt4*sqrt5
= 2+i sqrt5
I get 49-15- 14√15 i
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