why do the coordinate vectors of the abstract vectors with respect to the standard bases of their respective vector spaces correspond to the columns of the matrix mentioned in (a)matrices and (b)polynomials ?

Pleting the square f the given find the x-intercepts of the parabola with vertex (-5,13) and y-intercept (0, 12). write your answer in this form: (14,.99). if necessary, round to the nearest hundredth. *- h enter the correct answer, de verter, and ametry 00000 done doo