This algebra 2 and precalculus video tutorial explains how to convert a quadratic equation from standard form to vertex form with and without using the completing the square method by using another technique. That is, by using the x=-b/2a equation / formula to find the x coordinate of the vertex followed by the y-coordinate. The x and y coordinates of the vertex are known as h and k represented in the form v(h,k) which can be placed in the vertex equation y=a(x-h)^2+k starting from the standard form quadratic equation y=ax^2+bx+c. This video contains plenty of examples and practice problems for you to work on. This video also contain examples of converting standard form quadratic function into vertex form with fractions.
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