Factorise 108 into its prime factors using the Factor tree approach.

We need to follow the following steps to factorize a number using a factor tree method:

Step 1: Consider the given number to be the tree's root.

Step 2: Draw the pair of factors as if they were tree branches.

Step 3: Factorize the composite factors once more and note the factor pairs as the branches.

Step 4: Repeat the process until all of the composite factors have prime factors.

Let's factorize 108 using the above steps:

108= 2 x 2 x 3 x 3 x 3 = 2² x 3³