SOLUTION: Use quadratic formula and a calculator to solve. Round decimal approximations to the nearest hundredth. 2/3x^2 - 4/5x - 1/2 = 0

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Question 1029170: Use quadratic formula and a calculator to solve. Round decimal approximations to the nearest hundredth.
2/3x^2 - 4/5x - 1/2 = 0
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
2/3x^2 - 4/5x - 1/2 = 0
20x^2 - 24x - 15 = 0
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=1776 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 1.65356537528527, -0.453565375285274. Here's your graph:
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