SOLUTION: Stuck again.... ugh:-( Can someone please help me?? f(x)= -x^2+4x+1

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Question 64052: Stuck again.... ugh:-( Can someone please help me??
f(x)= -x^2+4x+1
Answer by sarahschober(35)   (Show Source): You can put this solution on YOUR website!
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=20 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: -0.23606797749979, 4.23606797749979. Here's your graph:
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