Question

Which special case is represented by x? - 121?

A. the difference of two squares
B. the difference of cubes
C. the square of a binomial
D. the sum of cubes

Answer 1

A. the difference of two squares

Explanation:

Please use the symbol " ^ " to indicate exponentiation.

Then we have x^2 - 11^2, which is the difference of two squares:

x^2 is a square, the square of x; and 11^2 is a square, the square of 11.

A. the difference of two squares

Note that a "difference of squares" is easily factored:

a² - b² = (a - b)(a + b)

and so your x² - 11² factors as follows: (x - 11)(x + 11)

Answer 2

A. The difference of two squares