Solve for the roots in the equation below.
x4 + 3x2 - 4 = 0
1 answer:
Answer: x = {1, -1, 2i, -2i}
<u>Step-by-step explanation:</u>
x⁴ + 3x² - 4 = 0
∧
-1 +4 = 3 this works!
(x² - 1)(x² + 4) = 0
x² - 1 = 0 and x² + 4 = 0
x² = 1 and x² = -4
x = ±1 and x = ± 2i
x = 1, -1 and x = 2i, -2i
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