SOLUTION: r^2-6r+8=0 please find the solution(s) for r

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Question 22574: r^2-6r+8=0 please find the solution(s) for r
Answer by stanbon(75887)   (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=4 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 4, 2. Here's your graph:


Cheers,
Stan H.

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