SOLUTION: Solve using the quadratic formula: 25x^2+30x+9=0 I do not understand this at all, please help :)

Question 172320This question is from textbook
: Solve using the quadratic formula: 25x^2+30x+9=0
I do not understand this at all, please help :) This question is from textbook

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Solve using the quadratic formula: 25x^2+30x+9=0
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Using the quadratic formula is just plugging in a, b and c.
For this one, a = 25, b = 30 and c = 9.

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=0 is zero! That means that there is only one solution: .
Expression can be factored:

Again, the answer is: -0.6, -0.6. Here's your graph:

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The onsite solver gives more detail then you might need, but it gets the answers, shows how it's done, and shows a graph.

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