SOLUTION: Use the quadratic formula to find the zeros of f. f(x)= -12x^2+11x+15

Question 1050590: Use the quadratic formula to find the zeros of f.
f(x)= -12x^2+11x+15
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Use the quadratic formula to find the zeros of f.
f(x)= -12x^2+11x+15
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Do it like this one:

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=181 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: -1.07560400784562, 3.40893734117895. Here's your graph:

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