Quadratic Functions, Equations and Inequalities

Quadratic Functions, Equations and Inequalities

Secondary 3

Solve:

  1. \((x-2)^2\leq0\);

  2. \((x-2)^2>0\).

Explain why the sign does not change when \(x\) passes through \(2\).

Solution:

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Answer:(a) \(x=2\); (b) \(x<2\) or \(x>2\); The square is positive on both sides.

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