SOLUTION: Use the quadratic formula to solve the equation. 2y^2-2y=7

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Question 307123: Use the quadratic formula to solve the equation. 2y^2-2y=7
Answer by Stitch(470)   (Show Source): You can put this solution on YOUR website!
Given:
Set the equation equal to zero

Use the quadratic equation
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=60 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 2.43649167310371, -1.43649167310371. Here's your graph:
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