Answer:
Given : Expression -
To find : How would the sum of cubes formula be used to factor given expression? Explain the process. Do not write the factorization.
Solution :
The formula of sum of cubes is,

First we convert the given expression in 

Apply exponent rule : 

Rewrite 
Therefore,
could be written as 
On comparison with the formula,
a=xy , b=7

56,000??
If you mean 56,000 then the nearest thousand is 56,000
Iron bridge is the first bridge to be ever built
f(x) is a linear function with no restrictions
Domain: x = All real numbers
Range: y = All real numbers
Hello,
False
(5-2)²+(6-6)²=3²+0=9 and not 4