The formula for the vertex form is:
f(x) = a(x-h)^2 + k
Where (h,k) is the vertex.
The equation also tells us the direction of opening, which is the a value, in this case opens up because a is positive. It tells us the step pattern, which when a is equal to one is always 1,3,5. However, when the a value is a number other than one, you muct multiply the value by 1,3,5.
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The vertex.
it is a vertices's form of a function known as Quadratic
It is still called a quadratic equation!
It depends on the level of your mathematical knowledge. One way is to differentiate the quadratic equation and find the value of x for which the derivative is 0. The advantage of this method is that it works for turning points of polynomials of all degrees. The disadvantage is that you need to know differentiation. For a quadratic, an alternative, and simpler way is to write the equation in the form: y = ax2 + bx + c Then the x value of the vertex is -b/2a
Normally a quadratic equation will graph out into a parabola. The standard form is f(x)=a(x-h)2+k