How do you know how many roots are in a problem? Ex: -2x^2 - 5x - 2= 0 **DON'T TELL ME THE ANSWER** Just explain how to do it.

Question

anonymous · Answer

you either apply the formula or use the rainbow method.

anonymous · Answer

I don't know what that means.

anonymous · Answer

hmm...i'm taking that you know:(x+a)(x+b)=quadratic function?

anonymous · Answer

Yeah.

anonymous · Answer

Are you supposed to find what is the roots.
real unreal etc.?

anonymous · Answer

b^2-4ac is the discriminant used to find the answer. What you get tells you what it is.

anonymous · Answer

Well, kinda. It's supposed to be which ones are real, distinct or real distinct and how many roots there are.

anonymous · Answer

Will it tell you how many roots there are?

raden · Answer

actually, i use the value of discriminat (D), is 
D = b^2-4ac
if D > 0 ; there are 2 real roots
if D=0, there is 1 real root
if D < 0 ; there are not real roots, but the imaginary roots

anonymous · Answer

How do you know if there's 3?

raden · Answer

the quadratic equation actually maximum have 2 roots, not 3 :)

anonymous · Answer

Thank you

raden · Answer

yw