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  1. An example of an equality relation of two expressions in x, which is not an identity is
    1. (x + 3)2 = x2 + 6x + 9
    2. (x + 2y)3 = x3 + 8y3 + 6xy(x + 2y )
    3. (x + 2)2 = x2 + 2x + 4
    4. (x + 3)(x – 3) = x2 – 9
Correct Option: C

According to equality relation (x + 2)2 = x2 + 4x + 4 is not an identity


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