SOLUTION: solve x^2 - 2x - 13 = 0

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Question 261839: solve x^2 - 2x - 13 = 0
Found 2 solutions by Stitch, checkley77:
Answer by Stitch(470)   (Show Source): You can put this solution on YOUR website!
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=56 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 4.74165738677394, -2.74165738677394. Here's your graph:
Answer by checkley77(12844)   (Show Source): You can put this solution on YOUR website!
x^2-2x-13=0

x=(2+-sqrt[-2^2-4*1*-13])/2*1
x=(2+-sqrt[4+52])/2
x=(2+-sqrt56)/2
x=(2+-7.48)/2
x=(2+7.48)/2
x=9.48)/2
x=4.74 ANS.
x=(2-7.48)/2
x=-5.48/2
x=-2.74 ans.
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