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Algebra question bank (Quantitative Aptitude)

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Q1.

The roots of the equation ${x^4} - 8{x^2} - 9 = 0$ are

(A)
$\pm 3, \pm 1$
(B)
$\pm 3, \pm i$
(C)
$\pm 2, \pm i$
(D)
None of these
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Q2.

The roots of the equation $ix^2 - 4x - 4i = 0$ are

(A)
$-2i$
(B)
$2i$
(C)
$-2i, -2i$
(D)
$2i, 2i$
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