Use the ideas developed in problem 6-118 to change each of the following quadratic equations into graphing form. Identify the vertex and the line of symmetry for each one.
Make the coefficient of
equal to by factoring out a in the first two terms.
Take half of 3 and square it. You get
. The indicates you really added or . So add the inside the parentheses and subtract the equivalent 9 outside the parentheses on the same side.
See part (a).