how do i graph this?
y=-(x+8)(x-6)

Question

how do i graph this? 
y=-(x+8)(x-6)

watermelon14 · Answer

@zepdrix do u know?

zepdrix · Answer

Based on the way it is factored,
do you know what the `zeros` or `x-intercepts` of the function are?

watermelon14 · Answer

yeah, but i am not sure and i suppose to FOIL it out to get a quadratic?

zepdrix · Answer

You could do that, but that seems unnecessary.
To find the x-intercepts, we let y=0.$$\large\rm 0=-(x+8)(x-6)$$

zepdrix · Answer

So what are your x-intercepts? :o

watermelon14 · Answer

6 is one but for the -(x+8) do i distribute the negative?

zepdrix · Answer

No.$$\large\rm 0=-(x+8)(x-6)$$Instead let's divide both sides by -1,
$$\large\rm 0=(x+8)(x-6)$$Zero divided by -1 remains 0, the other side becomes positive.
So you can see that the negative out front has no effect on our intercepts.

zepdrix · Answer

Or multiply both sides by -1,
whichever method makes more sense :)

watermelon14 · Answer

ok:p 
so i got -8 and 6

zepdrix · Answer

|dw:1445918585965:dw|Ok great.

zepdrix · Answer

|dw:1445918660379:dw|There is another nice easy point that we can get.
It lies on this purple line, the y-axis.