Question

20 POINTS!!!!!! (5 − 4i)(6 − 2i)

Answer 1

22 - 34i [ or 2(11-17i) ]

Explanation:

(5 − 4i)(6 − 2i) (expand parentheses by distributive property)

= (5)(6) + (5)(-2i) + (-4i)(6) + (-4i)(-2i)

= 30 - 10i - 24i + 8i²

= 30 - 34i + 8i² (recall that i² = -1)

= 30 - 34i + 8(-1)

= 30 - 34i - 8

= 22 - 34i [ or 2(11-17i) ]