Which of the following is not an identify ?

Options

A. `a^(2) + 2ab + b^(2) = (a + b) (a + b)`
B. `(x- y)^(2) = x^(2) - 2xy + y^(2)`
C. `(p +q) (p-q) = p^(2) - q^(2)`
D. x + 2 = 3

Answer

D

Explanation

x + 2 = 3 is not an identity .
Hence , the correct option is (d).