Something seems a bit off though.

Printable View

- Apr 1st 2012, 01:13 PMPast45Quadratic Equation via FormulaSomething seems a bit off though.
- Apr 1st 2012, 01:22 PMemakarovRe: Quadratic Equation via Formula
- Apr 1st 2012, 01:26 PMPlatoRe: Quadratic Equation via Formula
- Apr 1st 2012, 01:29 PMPast45Re: Quadratic Equation via Formula
Hu? Sorry a little confused. I did put the parentheses.. Only time in the book the parentheses are put in are when I plug in my numbers.

The answer for this is suppose to -3-2i or -3+2i - Apr 1st 2012, 01:29 PMemakarovRe: Quadratic Equation via Formula
- Apr 1st 2012, 01:38 PMPast45Re: Quadratic Equation via Formula
-6 ± √4i

----------- =

2

2(-3 √4i)

----------- =

2

the 2 cancels out so it will -3+-√2i

so will it look like this? - Apr 1st 2012, 01:39 PMemakarovRe: Quadratic Equation via Formula
The roots of the equation are , which you wrote as -6+-√6^2-4(1)(13)/2(1). As you know, in the standard order of operations division comes before subtraction, so your formula is . (In the text formula, it is also not clear where the square root ends.) And what about -6+-√16/2, which means or , but not ?

In any case, the main mistake is that the discriminant is negative. - Apr 1st 2012, 01:41 PMPast45Re: Quadratic Equation via Formula
Nevermind I kind of see it, -6/2 =-3. Duh..

- Apr 1st 2012, 01:42 PMPast45Re: Quadratic Equation via Formula
- Apr 1st 2012, 01:43 PMemakarovRe: Quadratic Equation via Formula
- Apr 1st 2012, 01:47 PMPlatoRe: Quadratic Equation via Formula
- Apr 1st 2012, 01:49 PMPast45Re: Quadratic Equation via Formula
- Apr 1st 2012, 02:04 PMemakarovRe: Quadratic Equation via Formula
- Apr 1st 2012, 02:05 PMPast45Re: Quadratic Equation via Formula
- Apr 1st 2012, 05:38 PMWilmerRe: Quadratic Equation via Formula