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September 20, 2014

September 20, 2014

Posted by **sarah** on Monday, March 2, 2009 at 4:42pm.

put in standard form a+bi

I really dont understand square roots so can you show me how to do these please

- Math -
**Reiny**, Monday, March 2, 2009 at 4:48pmby definition √-1 = i

so rewrite

(10√-13)(-5√-5) as

(10√-1√13)(-5√-i√5)

= (10i√13)(-5i√5)

= -50i^2√65

= +50√5

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