SOLUTION: This problem I must factor the quadratic expression completely, and find the roots of the expression. 135x^2 - 222x + 91

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Question 234937: This problem I must factor the quadratic expression completely, and find the roots of the expression.
135x^2 - 222x + 91
Answer by philline_palana(12) About Me  (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=144 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 0.866666666666667, 0.777777777777778. Here's your graph: