What is the conjugate of 20 - 7i?

Simplify i^21.

What is the product of the complex numbers 4i (6 + 4i)?

What is an equivalent form of (6 - 9i)^2?

Write an equivalent form of (3i - 2) - (2 - 6i)?

Write the quadratic expression in factored form: (x + 1)^2 - 49

Add: (12 + 6i) + (-6 + 13i)

Solve for x: 4x^2 + 3 = 0

What is the solution for (2x^2 - 2x + 5 = 0)?

What are the zeros of the polynomial function: (f(x) = x(x - 7)(x - 4))?