2. Factor completely, show your work. a) 12h2- 4h [K /2] b) 9-x2 [K 12] c) x - &x + 15 [K /2] d) 2k2+ 12k + 10 [K /3] e) 8m- -50 [K /3] f) 15d- -4d - 4 [K 13 ]