A quadratic function passes through the points (−3, 20), (0,−1), and (2, 15).
What is the equation of the function in standard form?

A) f(x)=3x^2−x−2
B) f(x)=3x^2−x+2
C) f(x)=3x^2+2x−1
D) f(x)=3x^2−2x−1