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aev [14]
3 years ago
10

Which of the equations are true identities?

Mathematics
1 answer:
Klio2033 [76]3 years ago
6 0

Answer:

Equation A is true; Equation B is not

Step-by-step explanation:

There is a standard formula for the "difference of cubes" that is:

x^3 - y^3 = (x - y)(x^2 + xy + y^2)

and this perfectly matches equation A.

Equation B has the square of n (n^2) on the left side but not on the right side.  Thus this is not an identity.

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