I don’t know if this is right or not but m < ABD + m < BDC = 90
Given:
1. Combining like terms (here terms 6x and 2x both contain x, then we can combine them):

2. Distributive postulate:

The equation is

3. Zero product postulate (zero product postulate state that if a product of two factors is equal to zero, then first factor is equal to zero or second factor is equal to zero):

4. Subtraction property of equality:
a) subtract 6 from the first equation:

b) subtract 2 from the second equation:

Answer:
Option D) 
Step-by-step explanation:
We are given the following in the question:

We have to write and equivalent expression for the same.
Exponential properties:

Using the above properties, we can write:

Thus, the correct option is
Option D) 