B7laneAm2bertGenee B7laneAm2bertGenee 26-07-2016 Mathematics contestada factor the expression. k^2 – 9h^2 a. h^2(k 3)(k – 3) b. (k – 3h^2)(k 3) c. (k 3h)(k 3h) d. (k 3h)(k – 3h)