Answer:

Step-by-step explanation:
Factor the equation
using formula for difference of the cubes:

then

1. The equation
has real solution 
2. The equation
has negative discriminant
then it has two complex solutions

Answer:-8
Step-by-step explanation:
Answer:
r=4/63
Step-by-step explanation:
Divide each term in 9r=47 by 9 and simplify.
Answer:
A) x=4
B)x=
+3 or 7.24
Step-by-step explanation:
The formula for the sine sum is

So, equation

Cannot be solved with standard ways. However, we can build special cases to make it work.
The most trivial example would be A=B=0. In this case, we have

If we work on this idea a little bit, we can produce examples like

And again we have


So, yes, it is possible that
, although solving the equation directly would be quite difficult.