For two complex numbers

and

, the product is

That is, you multiply the moduli and add the arguments. You have

and

, so the product is
What questions I mean there is no questions
Answer:
C
Step-by-step explanation:
subtracting 289 from both sides, will make one side will be equal to zero.
thus we can then easily solve for b.
can this answer get the brainliest tag?
The answer is 20
Hope this helps