Does this online tutoring thing really work? I am studying for the GRE and have math questions!

Question

turingtest · Answer

Ask a question and find out :)

anonymous · Answer

One of the roots of the equation x^2 + kx -6 = 0 is 3, and k is a constant.
Quantity A: The value of k
QUantity B: -1

Answer choices:
QUantity A is greater
Quantity B is greater
THe two quantitis are equal
Relationship cannot be determined from given info

radar · Answer

I THINK I GOOFED.  ONE OF THE ROOTS IS A 3.
(x-3)(x+2)= $$x ^{2}-x-6=0$$

radar · Answer

So k is a -1  And it is said that Quantitu B=-1   Now the relationship may be more obvious to you.

anonymous · Answer

In my original question it says that one of the roots is 3, so the way I see it the answer would look something like this:
(x-3)(x+2)=0
factored out it would be:
x^2-(1)x-6=0
so I guess the two quantities are equal...? It just looked wrong to me because the original equation they gave was: x^2 PLUS kx -6=0, so that tripped me up.

anonymous · Answer

oh yup, we both goofed it the first time we tried. these stupid GRE questions arent that hard, its almost more about reading comprehension than anything else.
thanks for your help!

radar · Answer

I believe you have solved it.  Great, I gotta go now (take a cat to the vet)