Solve the equation and express each solution in a+bi form x^4-7x^2-8=0

Question

asked Mar 7, 2021 189k views

2 Answers

Akos · Answer 1 · 2021-03-13T00:03:43+0000

Answer:

x = ±2√2, ±i

Explanation:

Step 1: Factor

(x² - 8)(x² + 1)

Step 2: Find roots

x² - 8 = 0

x² = 8

x = ±2√2

x² + 1 = 0

x² = -1

x = ±i