SOLUTION: I need help with these questions! I did the other 20 but these are too hard! 1) 3r^2-16r-7=0

Question 713847: I need help with these questions! I did the other 20 but these are too hard!
1) 3r^2-16r-7=0

Answer by BGutridge(15) (Show Source): You can put this solution on YOUR website!

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=340 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 5.73984815243096, -0.406514819097629. Here's your graph:

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