Answer: 
Step-by-step explanation:
For finding the quotient of the given division,
In the long division method, we will follow the following steps.
Step 1 : Here the divisor is d-2 and dividend is 
Multiply (d-2) by
and subtract the dividend by the resultant.
We get 
Step 2: Multiply (d-2) by
and subtract the remaining dividend by the resultant.
We get 
Step 3 : Multiply (d-2) by
and subtract the remaining dividend by the resultant.
We get 
Since, after getting 7 it is not possible further division,
Hence, Remainder = 7,
Quotient = sum of all expression by that we multiply (d-2) = 
Answer:
=> Apply law of cosine

=> input value

=> simplify

=> calulcation

=> apply rule: Distance must be greater than 0
which is about 14.51828
The equation is true 20/-10=-12/6 or -2=-2