SOLUTION: Quadratic equations are always hard for me to understand and believe me they can kill a day. :o{ Can you help me with the steps with this one. F(x) = -2x^2 + 2x + 8 THanks a

Question 356800: Quadratic equations are always hard for me to understand and believe me they can kill a day. :o{
Can you help me with the steps with this one.
F(x) = -2x^2 + 2x + 8
THanks a bunch!
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
They're all the same.

Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=68 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: -1.56155281280883, 2.56155281280883. Here's your graph:

----------

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
F(x) = -2x^2 + 2x + 8
----
You did not say what you want to do with this quadratic.
---
Graph:

===================================================
Y-intercept: If x = 0, y = 8
X-intercept: If y = 0, x = ?
Solve -2x^2+2x+8 = 0
-2(x^2-x-4) = 0
Quad. Formula:
x = [1 +- sqrt(1-4*-4)/2
x = [1+-sqrt(17)]/2
------------------------
Cheers,
Stan H.
RELATED QUESTIONS
hello i am an eight grader and i am having a hard time with quadratic equations they... (answered by Edwin McCravy)
I am having a very hard time with these quadratic equations. Can someone help me... (answered by anshu_a,nerdybill)
I have been asked to solve the equations simultaneously, and i believe one of them to be... (answered by venugopalramana)
Can you please help me with quadratic equations, and the general method used for them... (answered by RAY100)
Can you help me with the steps to this quadratic equation. 2x^2+7x+3=0 Thanks a... (answered by solver91311)
Can you help me with this proof? (O>R)>S / (P>R)~S // ~R The > is a horseshoe. I've... (answered by jim_thompson5910)
i just don't understand the problems that i am suppose to do and i think is very hard for (answered by atif.muhammad)
Can someone please help me with these. They are fraction ones and this is really hard for (answered by checkley75)
2.)Why do we have to check the solutions when we solve radical equations? 4.)... (answered by edjones)