Solve each system by elimination I need to know what x and y equal and I need to show ( a little bit )work

How do you use the elimination method for this question? explain, because i really want to understand!

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12