Question

What are the solutions of the equation x4 - 5x2 - 14 = 0? Use factoring
to solve.

Answer 1

x = ±√7, ±i√2

Explanation:

`x^4-5x^2-14=0\\(x^2-7)(x^2+2)=0\\`

`x^2 - 7 = 0` or
`x^2 + 2 = 0\\`

x^2 - 7 = 0

x^2 = 7

x = ±√7

or x^2 + 2 = 0

x^2 = -2

x = ±i√2