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Question

Determine the nature of the roots of the following equations.

(1)

(2)

(3)

(4)

(5)

(6)

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Solution

(1)

Comparing this equation with,

Let

Hence, the roots are real, irrational and distinct.

(2)

Comparing this equation with,

Let

Hence, the roots are imaginary.

(3)

Comparing this equation with,

Let

Hence, the roots are real, irrational and distinct.

(4)

Comparing this equation with,

Let

Hence, the roots are real, rational and equal.

(5)

Comparing this equation with,

Let

Hence, the roots are real, rational and distinct.

(6)

Comparing this equation with,

Let

Hence, the roots are imaginary.


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