√128 facotr and find pairs for squares that can go out of the radical (√) 128=2 times 2 times 2 times 2 times 2 times 2 times 2 group the pairs (2 times 2)(2 times 2)(2 times 2) times 2 write one of each pair outside 2 times 2 times 2√2 8√2 is the naswer