Where does the graph of y = 3x2 - 10x - 8 cross the x-axis?

(2/3,0) and (-4,0)
(-2/3,0) and (4,0)
(4/3,0) and (-2,0)
(-4/3,0) and (2,0)

Question

Where does the graph of y = 3x2 - 10x - 8 cross the x-axis?

(2/3,0) and (-4,0)
(-2/3,0) and (4,0)
(4/3,0) and (-2,0)
(-4/3,0) and (2,0)

anonymous · Answer

So first you will try to solve for X by factor out the equation using FOIL method.
$$3x ^{2}-10x-8$$
Can be factor out as 
$$(3x+2)(x-4)$$
Can you try to solve for X from here on?

parthkohli · Answer

It'll cross the x-axis when x = 0.
@Anhina good work, you explained rather than giving the answer :)

anonymous · Answer

or just test the values of all the x you were given its inefficient to do that but still works

anonymous · Answer

no man when y =0

anonymous · Answer

oh ok. so its the #2 right?