Which special case is represented by x^2 -121?
A.the difference of two squares
B.the difference of cubes
C.the square of a binomial
D.the sum of cubes
PLEEEASE HELP

Question

Which special case is represented by x^2 -121?
A.the difference of two squares
B.the difference of cubes
C.the square of a binomial
D.the sum of cubes  
PLEEEASE HELP

anonymous · Answer

d.

anonymous · Answer

could you tell me why?

anonymous · Answer

or anyone else?

triciaal · Answer

- means difference 
to the power 2 means squared
121 is a perfect square so can be written as 11^2

what you have is x^2 - 11^2 
difference of 2 squares

triciaal · Answer

thanks for the medal too.

triciaal · Answer

it proves you should not just accept answers if you want to learn. 
it is also against the code of conduct to just give answers.

triciaal · Answer

sum means add     eliminates D
cube means to the power 3      eliminates B 
squared means raised to the power of 2      eliminates C

anonymous · Answer

wish i could give you like 5 more medals man thanx