Question

What is the completely factored form of x4 + 8x2 – 9?

Answer 1

x = 3 x = -3  x=  0.0000 - 1.0000 i 
  x=  0.0000 + 1.0000 i 

Answer 2

Answer:

(x+1)(x-1)(x^2+9)

the answer is B on Edge