Vince Carter had 20 points and Josh Boone added 17 points and 14 rebounds in the game that featured 60 personal fouls, including 39 against the Nets.
Leading by a point at the half, the Warriors broke the game open in the third quarter, outscoring New Jersey 33-18 to take an 85-69 lead.
Biedrins, who was 8 of 11 from the field in posting his third straight double-double, had eight points, five rebounds and a steal in the 16-10 spurt that pushed the Warriors' advantage to 68-61 halfway through the period.
Jackson, who was limited to three points on just two shots in the first half, finished off New Jersey in the final six minutes of the quarter.
After rookie Brook Lopez hit a shot in the lane to cut the deficit to five, Jackson hit two 3-pointers and twice drove the lane for baskets in an 11-0 spurt that gave Golden State a 79-63 lead.
The Nets, who won their season opener in Washington, cut the lead to five points in the closing minutes, but Maggette hit four free throws in the final 43 seconds to ice the game.
Biedrins, who picked up two early fouls, scored 10 points in the second quarter to help the Warriors take a 52-51 halftime lead.
Golden State made 10 of 17 shots from the field in the period.
Notes: Nets starting F Yi Jianlian was scoreless in 17-plus minutes, missing all four of his shots. ... Nets F Eduardo Najera was active for the first time this season after missing most of training camp with a wrist injury. He had two points in just under five minutes. ... Former Nets G Marcus Williams sat on the bench for his third straight game with the Warriors. ... Carter had his left hand X-rayed during the game. It was negative.
