# SOLUTION: graph: y = x squared - 4x - 3

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Question 167602: graph: y = x squared - 4x - 3
Answer by Alan3354(30993)   (Show Source):
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graph: y = x squared - 4x - 3
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OK
 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=28 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: 4.64575131106459, -0.645751311064591. Here's your graph:

To be more clear, the solutions are:
and