SOLUTION: Apply the quadratic formula to find the roots of the given function, and then graph the function. f(x) = x^2 - 4 Thank you!

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Question 195382: Apply the quadratic formula to find the roots of the given function, and then graph the function.
f(x) = x^2 - 4
Thank you!
Answer by Mathtut(3670)   (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=16 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 2, -2. Here's your graph:
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