using

With:

a = 1, b = (-4) & c = (-3)

What do we do when we need to square root the -4 ?

using

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- Aug 11th 2009, 09:34 AMADYQuadratic Equation
using

With:

a = 1, b = (-4) & c = (-3)

What do we do when we need to square root the -4 ?

using - Aug 11th 2009, 09:45 AMskeeter
- Aug 11th 2009, 09:53 AMADY

? - Aug 11th 2009, 09:59 AMskeeter
- Aug 11th 2009, 10:11 AMLeslon
First of all, if you evaluate , with the numbers you provided, you end up with . So no problem here, i guess.

In the other case of a square root of a negative number, you will have to work with Complex numbers. Let us suppose you have to solve . The next step is to write as . If solve this root, you get . Now we have

. Let's simplify all that and we get

Greets,

Leslon