Question 322829
What's the exponent on the 2nd term?
---------------
If it's 2:
It's a quadratic in x^2
x^4-5x^2-36=0
You can factor it.
(x^2 + 4)*(x^2 - 9) = 0
x^2 = 9
x = ± 3
--------------
x^2 = -4
x = ± 2i
-------------
You can use the quadratic equation.
*[invoke solve_quadratic_equation 1,-5,-36]
----------------
The x given is actually x^2, so see above.