RandomNoodle5031 RandomNoodle5031 04-09-2019 Mathematics contestada If xy = a and x2 + y2 = b, which of the following is equivalent to 9b – 18a ? A) (3x – 3y)2 B) (3x – 6y)2 C) (9x – 9y)2 D) (9x – 18y)2