Add the complex expressions, and simplify
(4+7.9i)+(5+7.3i) can someone help me with this

Question

Add the complex expressions, and simplify
(4+7.9i)+(5+7.3i) can someone help me with this

anonymous · Answer

You add the "real" numbers with their imaginary; so it is 9 +15.2i

anonymous · Answer

(4+7.9i)+(5+7.3i) = (4+5) + (7.9+7.3)i = 9 + 15.2i

anonymous · Answer

Short answer: Simplify the following expression; express in terms of i.
square root of -25

anonymous · Answer

can someone please please help me with this

anonymous · Answer

remember, even with negatives
$$\sqrt{ab} = \sqrt{a}\sqrt{b}$$

so let a = 25 , and b = -1 

what do you get?

anonymous · Answer

are you helping with mine

anonymous · Answer

yes. 
does this example help?

$$\sqrt{-16} = \sqrt{16}\sqrt{-1} = 4 \times \sqrt{-1} = 4i$$

anonymous · Answer

no

anonymous · Answer

its square root sign with -25 inside

anonymous · Answer

and says to express in terms of i simplify

anonymous · Answer

i do not understand how to work this problem can you please help

anonymous · Answer

how did you get -1 from 16

anonymous · Answer

dont leave me now