How do you find the zeros of # y = 2x^2 + 4x -1 # using the quadratic formula?
This quadratic function is written in "standard form", or
The quadratic formula uses the numbers a, b, and c like this:
comparing the original function to the general, standard form function above, we see that
Plug these in the quadratic formula:
To simplify that
You can take out
From here, divide through by 4 to get
...and remember, quadratic functions always have two solutions!