9:4:5.....added together = 18
9/18 (72) = 648/18 = 36
4/18 (72) = 288/18 = 16
5/18 (72) = 360/18 = 20
so we have 36:16:20
Answer:
A
Step-by-step explanation:
............................ ....
Take the root of both sides, and solve.
x = 2i sqrt 2, -2i sqrt 2.