Answer:
x = 3, -3, 2i and -2i where i is an imaginary number.
Step-by-step explanation:
We can express the equation as , and we can make . So, we have the equation ; to find the solutions of this last equation, we should find two numbers such that these numbers sum up to -5 and multiplied result in -36, these numbers are -9 and 4. Therefore is equivalent to , but , so, , i.e., . This last product is equal to zero when x = 3, x = -3 or , , i.e., . Therefore the solutions of the equation are x = 3, -3, 2i and -2i where i is an imaginary number.