Question

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

Answer 1

Answer:

x = ±2√2, ±i

Step-by-step 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

Answer 2

Answer:

The answer is B

Step-by-step explanation: