Question

compute the discriminant of 2x^2-4x+9=2

Answer 1

If I'm right the discriminant is: \[\sqrt{b^2-4(ac)}\]

Answer 2

oh yeah that's it

Answer 3

do you know then how to describe the solutions

Answer 4

So just plug in values:\[\sqrt{(-4)^2-4(2)(7)}\]

Answer 5

and you have to set the original equal to 0:
\[2x^2-4x+7=0\]

Answer 6

how do I use \[\sqrt{-40}\] to describe a solutions

Answer 7

when it's negative that means that there are no REAL solutions.. there are gonna be imaginary solutions

Answer 8

ok thanksss

Answer 9

Np :P