How many different sets of 2 initials can be made from the letters of the English alphabet?

Find the indicated value, where g(t) = t^2-t and f(x)= 1+x a. -2 b. 0 c. 2 d. 8

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.