SOLUTION: apply the quadratic formula to find the roots of the given function, and then graph the function. f(x) = x2 - 4

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Question 48344: apply the quadratic formula to find the roots of the given function, and then graph the function.
f(x) = x2 - 4
Found 2 solutions by stanbon, venugopalramana:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
f(x) = x^2 - 4
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=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:

Cheers,
Stan H.
Answer by venugopalramana(3286)   (Show Source): You can put this solution on YOUR website!
apply the quadratic formula to find the roots of the given function, and then graph the function.
f(x) = x2 - 4=0




X=2..OR...-2
X.....0.......1......2.......3........4.....ETC
Y.....-4......-3.....0.......5........12
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