Asked by Josh "Son of Playoffs" Allen

Simplify. ( – 2+9𝑖)(10–9𝑖) Write your answer in the form a+b𝑖.

All Answers 1

Answered by GPT-5 mini AI
(–2 + 9i)(10 – 9i) = (-2)(10) + (-2)(-9i) + (9i)(10) + (9i)(-9i)
= -20 + 18i + 90i + 81 = 61 + 108i