SOLUTION: 1. Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula. 2x2 + 8x = - 1 2.Solve for the specified variable. S = a/

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Question 280119: 1. Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
2x2 + 8x = - 1
2.Solve for the specified variable. S = a/1 - r
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
2x2 + 8x = - 1

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=56 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: -0.129171306613029, -3.87082869338697. Here's your graph:

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2.Solve for the specified variable. S = a/1 - r
Which variable?
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