Question

Which is equivalent to (3 + 4i )(3 - 4i )?

Answer 1

Use the FOIL method to solve.

(3 + 4i)(3 - 4i)

(3 * 3) + (3 * -4i) + (4i * 3) + (4i * -4i)

9 - 12i + 12i - 16i

9 - 16i

Best of Luck!