What are the solutions of the equation x4 – 5x2 – 36 = 0? use factoring to solve. x = ±2 and x = ±3 x = ±2i and x = ±3 x = ±2 and x = ±3i x = ±2i and x = ±3i

x=3,-3,2i,-2i

Step-by-step explanation:

Given is a poynomial of degree 4 as

This polynomial has no terms with odd powers of x.

Hence for simplicity let us assume that

The equation becomes now a quadratic in y as

Equate each factor to 0 to get

Replace y by x square to have

Take square roots

are the solutions

we don't have enough info to solve this

one that is bigger than 3 1/2