How to solve this inequalities problem?
1. -2x^2+6x+15≤0
2. 2x^3+13x^2-8x-46≥6
3. 5/x-63/x+2
4. 3x/x-1≤(x/x+4) +3

Question

How to solve this inequalities problem? 
1. -2x^2+6x+15≤0
2. 2x^3+13x^2-8x-46≥6
3. 5/x-6>3/x+2
4. 3x/x-1≤(x/x+4) +3

anonymous · Answer

which one you want first?

anonymous · Answer

lets start with this one$$-2x^2+6x+15≤0$$

anonymous · Answer

you have to factor it, 
i hate factoring, but it is easiest if the leading coefficient is positive, so lets change the signs and the inequality to get 
$$2x^2-6x-15\geq 0$$ the factor as 
damn it doesn't factor
you sure this is the exact problem?  we can still solve it, it will just be more of a pain

anonymous · Answer

Yes that's the problem. Idk factoring im not good at it haha lol

anonymous · Answer

I know the rules but im still confuse with inequalities lol

anonymous · Answer

go to mathway.com

anonymous · Answer

you will get the exact answer if you type the inequalities in

anonymous · Answer

I don't have credit card. It doesn't  show the solution only the answer

ganeshie8 · Answer

use quadratic formula and find x-intercepts

anonymous · Answer

How? :/

ganeshie8 · Answer

$2x^2-6x-15 =  0 $

ganeshie8 · Answer

solve x using quadratic formula

ganeshie8 · Answer

here is the formula :-

$x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}$

anonymous · Answer

attachment

anonymous · Answer

attachment