A factor tree branches down into 2 branches. The first number 1,225 branches down on the left to 5 and on the right to 245. 245 branches down to 5 on the left and 49 on the right. 49 branches down to 7 on the left and 7 on the right. A factor tree is shown for 1,225. What is the simplest form of StartRoot 1,225 EndRoot?