Find the sum of the first 5 terms of the geometric series -2, -6, -18, …

Me with this one question, and i'll upvote the brainliest answer

What are the solution(s) to the quadratic equation x2 – 25 = 0? o x = 5 and x = -5ox=25 and x = -25o x = 125 and x = -125o no real solution

If y varies directly as x2 and y=6 when x=6, find the constant of variation.