Question

Medal and fan
Is completing the square is a good method for solving when the Discriminant is negative? Why?

Answer 1

@HHS6281019... u must keep this thing in mind that u need to use the method in which u r most comfortable...
and these methods donot make a difference..

Answer 2

leet me see if i could get a link for u to look upon..

Answer 3

here is it...almost same kinda question http://answers.yahoo.com/question/index?qid=20140123081541AAoDk8A

go ahead.. and take a reading...

Answer 4

It doesn't really depend on whether the discriminant is negative.

Consider the following:
x²+2x+14
Here the discriminant is negative, and completing the square would be really easy

But have a look at this:
13x²+2x+14
Here the discriminant is still negative, but completing the square would a pain in the retrice Why? In order to complete the square, the coefficient of x² must be one. This means you would have to take out a factor of 13, and then deal with horrendous fractions, whereas by simply inputting the values into the quadratic equation the job could be done in no time.

So it really doesn't matter whether or not the discriminant is negative :)
Hope this helps

Answer 5

Yup, thanks!