Question

Simplify (–2 + 10i)(–2 – 10i)

Answer 1

(−2+10i)(−2−10i) =104

Answer 2

104

Explanation:

(-2 + 10i) (-2 – 10i)

Distribute using FOIL (first, outer, inner, last).

(-2)(-2) + (-2)(-10i) + (10i)(-2) + (10i)(-10i)

4 + 20i – 20i – 100i²

4 – 100i²

4 + 100

104