6. (a) By dividing through the equation x4 – 10x3 + 32x2 – 40x + 16 = 0 byx? otherwise, solve the equation completely.
(b) Solve the equation x4 + x3 – 4x2-x + 1 = 0.
(c) Solve the following equation by dividing through by 4x2.
or

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