Question

Can some one plz help

Answer 1

x = ±i
`√(2)`, x = ±i

Explanation:

x^4 + 3x^2 + 2 = 0

x^4 + x^2 + 2x^2 + 2 = 0

x^2 ( x^2 + 1 ) + 2 ( x^2 + 1 ) = 0

( x^2 + 2 ) ( x^2 + 1 ) = 0

x^2 + 2 = 0, x^2 + 1 = 0

x^2 = -2, x^2 = -1

x = ±i
`√(2)`, x = ±i