Using the identity (a + b)(a − b) = a² −b² , find the following product.
(p + 2)(p − 2)

Evaluate the following, using suitable identity.
998²

If a + b = 10 and ab = 18, find the value of a² + b².

Solve the following inequations and represent the solution on the number line:
k > −5, k is an integer.

If x = a² −1 and Y = 1−b² , then find X + Y and factorize the same.