Quadratic Functions, Equations and Inequalities

Quadratic Functions, Equations and Inequalities

Secondary 3

For \(x^2-4x+k=0,\) find the values of \(k\) giving:

  1. two equal real roots;

  2. two distinct real roots;

  3. no real roots;

  4. real roots.

Solution:

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Answer:(a) \(k=4\); (b) \(k<4\); (c) \(k>4\); (d) \(k\leq4\).

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