Is there a way to get an accurate square root?

This means that a negative number should return the appropriate complex

number. I have been having some trouble with this in a program that

solves quadratic equations recently. Ideally but not necessarily it

should be able to get the square root of complex numbers as well.

NB Neither -2**0.5 or Math::sqrt(-2) return appropriate answers. (-2 and

an error respectively)

Thanks in advance.

Hello Angus,

2010/5/29 Angus H. [email protected]:

Is there a way to get an accurate square root?

This means that a negative number should return the appropriate complex

number. I have been having some trouble with this in a program that solves

quadratic equations recently. Ideally but not necessarily it should be able

to get the square root of complex numbers as well.

NB Neither -2**0.5 or Math::sqrt(-2) return appropriate answers. (-2 and an

error respectively)

require ‘complex’

include Math

c = Complex(-2,0)

sqrt(c)

require ‘complex’

=> true

include Math

=> Object

c = Complex(-2,0)

=> Complex(-2, 0)

sqrt(c)

=> Complex(0.0, 1.4142135623731)

Cheers,

On May 29, 3:33 pm, Angus H. [email protected] wrote:

Is there a way to get an accurate square root?

sqrt(c)=> Complex(-2, 0)

sqrt(c)

=> Complex(0.0, 1.4142135623731)

Cheers,

FYI. For more extensive (and easy) way to add the ability

to find the nth roots of all numerical types check out

my Roots module here:

Jabari

Thanks I had tried require complex and Math::sqrt but only separately.

Thanks again.

Angus