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A. 3-sqrt(-16) B. -4 C. -2i+i^2 D. (sqrt(-43)^2 E. 3i^2-5i^3

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1 Answer

A. The sqrt of -1 is i therefore:
 
3-√16 x √-1 simplified to a+bi form is:
 
3-4i
 
B. Not asked to do anything here but if you take the sqrt of -4 = √4 x √-1 = 2i
 
C.-2i+i2  i2=-1
 
-1-2i
 
D. √-432 = √432 x √-1= 43i
 
E. 3i2-5i3 = 3(-1)-5(-1)(i) = -3+5i