
Example: Solve x^{4} + x^{2}  12 = 0 Solution: The given equation is not quadratic We reduce it Put x^{2} = y, then the equation becomes y^{2} + y  12 = 0 The factors are y = 3, y = 4 If y = 3, then x^{2} = 3. Therefore x = +Ö3, Ö3 If y = , then x = +2i, x = 2i
Directions: Solve the following equations 