Helpp! Pls. I am desperate i will mark brainliest

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4