How do you find the zeros of # y = 3x^2 - 13x +15 # using the quadratic formula?
This sucker has complex roots!
The quadratic Formula is:
Plugging in A = 3, B = -13, C = 15 gives you:
Which is your problem, since there is no square root of a negative number.
Best you can do is rewrite it as a COMPLEX number of form
So you can do a little rewrite of
And then evaluate it once for the positive case of the
(Note that I've rounded off.