What is the equation of x(x-6)

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

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation.