SOLUTION: y=-2x^(2)+2x+5

Question 469985: y=-2x^(2)+2x+5
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
-2x2+2x+5=0
0=2x2-2x-5

Solved by pluggable solver: SOLVE quadratic equation with variable

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=44 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: -1.1583123951777, 2.1583123951777. Here's your graph:

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