DALLAS — Erik Cole scored twice and Tyler Seguin netted his 20th goal of the season as the Dallas Stars edged the struggling Los Angeles Kings 3-2 on Tuesday night.Jeff Carter and Anze Kopitar scored for Los Angeles, which has lost four straight. The Kings, beaten at Chicago on Monday, will end a four-game trip on Thursday at St. Louis. The Stars have earned five points during the first three games of a five-game homestand. Kari Lehtonen (16-8-7) stopped 23 shots for Dallas. Cole notched his second two-goal game of the season, and both have come within Dallas’ past three games. Seguin reached 20 goals for the second time in his four-year NHL career. He had 29 goals in 2011-12 with Boston.Dallas’ previously anemic power play accounted for Cole’s first goal and Seguin’s tally. It was the first time the Stars have scored multiple power-play goals in a game since Oct. 11. Dallas went into the game with the NHL’s 29th-ranked power play (11.7 percent) and the league’s worst at home (4.8 percent). Seguin put Dallas ahead for good at 12:13 of the second period. He corralled a puck that caromed off the boards behind Ben Scrivens (17-5-4) and banged it off Scrivens’ left skate as the goalie slid across the crease to try to cover the opposite post. Cole followed three minutes later with a wrist shot from a sharp angle near the goal line that beat Scrivens to his right. Carter gave Los Angeles its first lead during a 4-on-3 power play with a deflection of Mike Richards’ shot that popped over the right shoulder of Lehtonen. But about three minutes later, Cole tied it by swatting in a rebound that was nicked by Dallas’ Alex Chiasson following a shot from the left point by Seguin 35 seconds into a power play. Kopitar accounted for the final margin 1:05 into the third period.