2000+600+80+7 is the answer
use 
to get 
then use 
and 
also, 
to get 
then again use the first identity In both pairs, i.e.
to get 
multiply and divide by 4 to get the RHS.
because, 
squaring both sides, 
To solve this problem you must apply the proccedure shown below:
1. As you can see in the figure attached, the sides of smaller square measure 4 units.
2. The sides of the larger square measure 5 units.
3. Therefore, the ratio is: 5units/4 units
4. Then, "d" is:
d=5/4
5. Then, the larger square is dilated by a factor of d=5/4.
