In fact, talking with the patient may be the most important diagnostic tool the doctor has. The recommendation is that doctors routinely screen all individuals for depression. This screening might occur during a visit for a chronic illness, at an annual wellness visit, or during a pregnancy or postpartum visit.
1 is called the standard form, 2  is called the factored form, where x1 and x2 are the roots of the quadratic function and the solutions of the corresponding quadratic equation. 3  is called the vertex form, where h and k are the x and y coordinates of the vertex, respectively.
To find the vertex, I look at the coefficients: a = 1 and b = 4. Note that I picked x-values that were centered around the x-coordinate of the vertex. 1  Find the x-intercepts and vertex of y = x2 + 2x  4.  To find the vertex, I look at the coefficients: a = 1 and b = 2.