SOLUTION: I do not understand this equqtion. I need to solve for x. Could you please explain this step by step so I have a better understanding. Thanks x^4+13x^2+36=0

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I do not understand this equqtion. I need to solve for x. Could you please explain this step by step so I have a better understanding. Thanks x^4+13x^2+36=0      Log On


   

Question 379278: I do not understand this equqtion. I need to solve for x. Could you please explain this step by step so I have a better understanding. Thanks
x^4+13x^2+36=0
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Think of it as a quadratic equation in x%5E2, so that the equation becomes
%28x%5E2%2B4%29%28x%5E2+%2B+9%29+=+0. Then use the zero-product property to find the roots. (They will be complex roots!)