SOLUTION: Hi all need help with 5b^2-7b-1=0 Thanks

Question 734024: Hi all
need help with 5b^2-7b-1=0
Thanks
Answer by richwmiller(17219) (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=69 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 1.53066238629181, -0.130662386291807. Here's your graph:

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