What's wrong with my quadratic equation?

[puddinggreg offline]

What's wrong with this quadratic equation?
the original is 6x^2+7x-3=0
find x

x=(-7+((49-4*6*-3)exp(.5)))/(2*6)
or
x=(7+((49-4*6*-3)exp(.5)))/(2*6)

What has gone wrong here? I plugged it into this site's calc and I got an answer that is very wrong. What's going on?

[puddinggreg offline]

I fixed it.

In case anybody else is having this problem, the calculator on this website offers an exponent function, but it doesn't work; it successfully introduces an exponent, but doesn't allow a base, making powers unavailable. Instead use the ^ key to represent exponents.

A little arbitrary.

[admin]

6x^2+7x-3=0

6x^2+7x-3=0 equals (2x+3)*(3x-1)=0

(2x+3)*(3x-1)=0