IS this correct? xx

Question

IS this correct? xx

zarkam21 · Answer

attachment

mathmale · Answer

Quick question:  Have you calculated the discriminant?  If so, the discriminant rules we've discussed will tell you immediately what the answer is.

mathmale · Answer

What is 64-180?  Can you figure out where that came from?

zarkam21 · Answer

well 64 is from 8^2

zarkam21 · Answer

and that would be a negative #?

welshfella · Answer

disriminant is b^2 - 4ac
= 8^2 - 4*3*5 =  ?

welshfella · Answer

= 64 - 60

zarkam21 · Answer

4?

welshfella · Answer

right 
so discriminant is > 0
- what does that tell you about the zeroes of the function

zarkam21 · Answer

positive?

zarkam21 · Answer

it is greater than 0

mathmale · Answer

The discriminant formula is b^2-4ac.  Your a=3, your b=8, and your c=5.
Try again:  evaluate b^2-4ac.

mathmale · Answer

nevermind.  You're correct.  The discr. is 4.  Therefore, you have 2 unequal, real roots.

zarkam21 · Answer

oh so 2?

zarkam21 · Answer

yeah thats what I thought, just got confused

mathmale · Answer

If you're counting the number of roots that exist...remember that a quadratic always has 2 roots.

mathmale · Answer

So yes, your original answer was and still is correct.  Nice work.

zarkam21 · Answer

Ugh who do I medal :/ lol

mathmale · Answer

Don't worry about that.  I help because I like to, not for the medals.  I nominate welshfella to receive the medal.