One coin is randomly selected from a jar containing 70 nickels 100 dimes, 80 quarters & 50 one dollar coine fine the probabilty of a quarter

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6