Tính: 22√13 − 2√11

Bài 1: a,22√13−2√112132−112 + 54+2√1154+112 - 2√52522. b, 2√6+22√56+2522 + 2√9−42√59−4522 -2√20202. Bài 2: a, 32√xx2 = 2√16x16x2 -5 b, 2√4x−84x−82 - 2√9x−189x−182 +42√x−225x−2252 =-3 c, x-2√5x+45x+42 =2