Solve the inequality: (x+3) (x-5) 0

Question

Solve the inequality: (x+3) (x-5) > 0

misty1212 · Answer

HI!!

misty1212 · Answer

$$y=(x+3)(x-5)$$ is a parabola that opens up
it is negative between the zeros, positive outside of them |dw:1428371345850:dw|

surana · Answer

Yes, I know, this looks a lot like the one other problem I posted an hour before. It's the same but with a different sign. And the answers are A: X < -3 or X > 5 B: X < -5 or X > 3 C: -3 < X < 5 D: -5 < X < 3

surana · Answer

Hi, good to see you again, Misty.

misty1212 · Answer

you understand "greater than zero" is the same as "positive' right?

surana · Answer

But this is what I'm working with right now, another user helped me with a problem identical to it, so I think that the answer is supposed to be D, but I wanted to check here.

surana · Answer

Yes, I understand that greater than zero is positive.

misty1212 · Answer

and you understand that "positive" is a synonym for "above the x axis" yes?

surana · Answer

Yes.

misty1212 · Answer

ok then take a look at the picture of the parabola i drew
you see that between the zeros $-3$ and $5$ the curve is BELOW  the x axis

surana · Answer

I see it's below the X axis, which would be the horizontal line.

misty1212 · Answer

|dw:1428371645763:dw|

surana · Answer

So it's in the negative zone, then.